ORIGINAL_ARTICLE
مطالعه عددی تاثیر تزریق دیاکسیدکربن درون اکسیدکننده بر ساختار شعله در رژیم احتراقی بدون شعله
هدف از مطالعه حاضر بررسی تاثیر تزریق دیاکسیدکربن درون اکسیدکننده در احتراق بدون شعله بر روی ساختار شعله با استفاده از شبیهسازی عددی کوره بدون شعله است. استفاده از مقادیر مختلف تزریق دیاکسیدکربن منجربه تشکیل سه احتراق سوخت-هوا، اکسیژن-غنی و سوخت-اکسیژن میشود. شبیهسازیهای عددی با استفاده از نرمافزار اپنفوم انجام شده است. از مدل کی-اپسیلون استاندارد، بهمنظور مدلسازی آشفتگی و از مدل فاز گسسته، بهمنظور مدلسازی تشعشعی، استفاده شده است. همچنین، بهمنظور اعتبارسنجی مدل احتراقی، از چهار مدل برمبنای مدل مفهوم اتلاف گردابه استفاده شده است. بررسیها بر روی توزیع دما، تاخیر در اشتعال، رنگ شعله و تغییرات رادیکال هیدروکسیل برای بررسی ساختار شعله انجام شده است. نتایج نشان میدهند که با انتقال از احتراق سوخت-هوای بدون شعله به احتراق اکسیژن-غنی و سوخت-اکسیژن بدون شعله، که همراه با جایگزینی بخش یا تمام کسر جرمی نیتروژن با دیاکسیدکربن است، بیشینه دمای شعله، بهعلت ظرفیت حرارتی بالاتر دیاکسیدکربن و حضور فعالتر آن در واکنشهای گرماگیر، کاهش مییابد. علاوهبر این، وجود دیاکسیدکربن در شرایط احتراقی اکسیژن-غنی و سوخت-اکسیژن سبب میشود تا فرایند اشتعال با تاخیر همراه شده و از غلظت رادیکال تحریکشده متیلایدین (CH*)، که عامل انتشار نور مرئی است، بهصورت قابل توجهی کاسته شود.
https://www.jfnc.ir/article_114354_09a993b82a678ddadb132ccb47eb2c34.pdf
2020-09-22
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احتراق بدون شعله
تزریق دیاکسید کربن
احتراق اکسیژن غنی
احتراق سوخت- اکسیژن
ساختار شعله
اسماعیل
ابراهیمی فردویی
e.ebrahimifordoei@modares.ac.ir
1
دانشکده مهندسی مکانیک دانشگاه تربیت مدرس
AUTHOR
کیومرث
مظاهری
kiumars@modares.ac.ir
2
استاد مهندسی مکانیک/دانشگاه تربیت مدرس
LEAD_AUTHOR
M. M. Maroto-Valer, Developments and Innovation in Carbon Dioxide (CO2) Capture and Storage Technology: Carbon Dioxide (CO2) Storage and Utilisation, First Edition, Cambridge, Elsevier, 2010.
1
F. Chitgarha and A. Mardani, “Assessment of steady and unsteady flamelet models for MILD combustion modeling,” International Journal of Hydrogen Energy, 43, No. 32, 2018, pp. 15551-15563.
2
A. Rebola, M. Costa and P. J. Coelho, “Experimental evaluation of the performance of a flameless combustor,” Applied thermal engineering, 50, No. 1, 2013, pp. 805-815.
3
P. Li, J. Mi, B. Dally, F. Wang, L. Wang, Z. Liu, S. Chen and C. Zheng, “Progress and recent trend in MILD combustion,” Science China Technological Sciences, 54, No. 2, 2011, pp. 255-269.
4
P. Li, B. B. Dally, J. Mi and F. J. C. Wang, “ MILD oxy-combustion of gaseous fuels in a laboratory-scale furnace,” Flame, 160, No. 5, 2013, pp. 933-946.
5
M. Sánchez, F. Cadavid and A. Amell, “Experimental evaluation of a 20 kW oxygen enhanced self-regenerative burner operated in flameless combustion mode,” Applied energy, 111, 2013, pp. 240-246.
6
A. Mardan and A. F. Ghomshi, “Numerical study of oxy-fuel MILD (moderate or intense low-oxygen dilution combustion) combustion for CH4–H2 fuel,” Energy, 99, 2016, pp. 136-151.
7
J. Zhang, J. Mi, P. Li, F. Wang and B. B. J. E. Dally, “Moderate or intense low-oxygen dilution combustion of methane diluted by CO2 and N2,” Fuels, 29, No. 7, 2015, pp. 4576-4585.
8
S. Chen, H. Liu and C. J. E. Zheng, “Methane combustion in MILD oxyfuel regime: Influences of dilution atmosphere in co-flow configuration,” Energy, 121, 2017, pp. 159-175.
9
C. Dai, Z. Shu, P. Li and J. J. E. Mi, “Combustion characteristics of a methane jet flame in hot oxidant coflow diluted by H2O versus the case by N2," fuels, 32, No. 1, 2018, pp. 875-888.
10
Y. Tu, H. Liu and W. Yang, “Flame characteristics of CH4/H2 on a jet-in-hot-coflow burner diluted by N2, CO2, and H2O,” Energy & Fuels, 31, No. 3, 2017, pp. 3270-3280.
11
Y. Tu, K. Su, H. Liu, S. Chen, Z. Liu and C. J. E. Zheng, “Physical and chemical effects of CO2 addition on CH4/H2 flames on a Jet in Hot Coflow (JHC) burner,” Fuels, 30, No. 2, 2016, pp. 1390-1399.
12
K. P. Cheong, P. Li, F. Wang and J. J. E. Mi, “Emissions of NO and CO from counterflow combustion of CH4 under MILD and oxyfuel conditions,” Energy, 124. 2017. pp. 652-664.
13
E. Ebrahimi Fordoe and K. Mazaheri, “Chemical and Physical Effects of Carbon Dioxide Injection with Different Preheating Temperature in Flameless Combustion,” Amirkabir Journal of Mechanical Engineering, 52, No. 2, 2018, pp. 21-30.
14
Y. Tu, M. Xu, D. Zhou, Q. Wang, W. Yang and H. J. A. e. Liu, “CFD and kinetic modelling study of methane MILD combustion in O2/N2, O2/CO2 and O2/H2O atmospheres,” Applied Energy, 240, 2019, pp. 1003-1013.
15
M. H. Moghadasi, R. Riazi, S. Tabejamaat and A. J. J. o. E. R. T. Mardani, “Effects of Preheating and CO2 Dilution on Oxy-MILD Combustion of Natural Gas,” Jouran of Energy Resources Technology, Vol. 141, 2019, pp. 122002-122013.
16
Y. Minamoto and N. Swaminathan, “Scalar gradient behaviour in MILD combustion,” Combustion and flame, 161, No. 4, 2014, pp. 1063-1075.
17
N. A. K. Doan, N. Swaminathan and Y. Minamoto, “DNS of MILD combustion with mixture fraction variations,” Combustion and Flame, 189, 2018, pp. 173-189.
18
N. A. K. Doan and N. Swaminathan, "Autoignition and flame propagation in non-premixed MILD combustion," Combustion and Flame, 201, 2019, pp. 234-243.
19
A. Parente, M. R. Malik, F. Contino, A. Cuoci and B. B. Dally, "Extension of the Eddy Dissipation Concept for turbulence/chemistry interactions to MILD combustion," Fuel, 163, 2016, pp. 98-111.
20
M. T. Lewandowski and I. S. Ertesvåg, "Analysis of the Eddy Dissipation Concept formulation for MILD combustion modelling," Fuel, 224, 2018, pp. 687-700.
21
I. R. Gran and B. F. Magnussen, “A numerical study of a bluff-body stabilized diffusion flame. Part 2. Influence of combustion modeling and finite-rate chemistry,” Combustion Science and Technology, 119, No. 1-6, 1996, pp. 191-217.
22
B. F. Magnussen, “The eddy dissipation concept: A bridge between science and technology,” ECCOMAS thematic conference on computational combustion, Libson, Portugal, 2005.
23
B. F. Magnussen and B. H. Hjertager, “On mathematical modeling of turbulent combustion with special emphasis on soot formation and combustion,” Symposium (international) on Combustion, Cambridge, Massachusetts, August 1976.
24
J. Aminian, C. Galletti, S. Shahhosseini and L. Tognotti, “Key modeling issues in prediction of minor species in diluted-preheated combustion conditions,” Applied Thermal Engineering, 31, No. 16, 2011, pp. 3287-3300.
25
S. R. Shabanian, P. R. Medwell, M. Rahimi, A. Frassoldati and A. Cuoci, “Kinetic and fluid dynamic modeling of ethylene jet flames in diluted and heated oxidant stream combustion conditions,” Applied thermal engineering, 52, No. 2, 2013, pp. 538-554.
26
A. De, E. Oldenhof, P. Sathiah and D. Roekaerts, “Numerical simulation of delft-jet-in-hot-coflow (djhc) flames using the eddy dissipation concept model for turbulence–chemistry interaction,” Flow, Turbulence and Combustion, 87, No. 4, 2011, pp. 537-567.
27
A. Mardani, “Optimization of the Eddy Dissipation Concept (EDC) model for turbulence-chemistry interactions under hot diluted combustion of CH4/H2,” Fuel, 191, 2017, pp. 114-129.
28
A. Rebola, P. Coelho and M. Costa, “Assessment of the performance of several turbulence and combustion models in the numerical simulation of a flameless combustor,” Combustion Science and Technology, 185, No. 4, 2013, pp. 600-626.
29
S. H. Kim, K. Y. Huh and B. Dally, “Conditional moment closure modeling of turbulent nonpremixed combustion in diluted hot coflow,” Proceedings of the Combustion Institute, 30, No. 1, 2005 pp. 751-757.
30
E. Ebrahimi Fordoei and K. Mazaheri, “Numerical study of chemical kinetics and radiation heat transfer characteristics on the temperature distribution in the oxy-fuel combustion,” Heat and Mass Transfer, 55, No. 7, 2019, pp. 2025-2036.
31
G. P. Smith, D. M. Golden, M. Frenklach, N. W. Moriarty, B. Eiteneer, M. Goldenberg, C. T. Bowman, R. K. Hanson, S. Song and W. C. J. G. R. I. Gardiner Jr, GRI 3.0 Mechanism, 1999, Gas Research Institute http://www.me.berkeley.edu/gri_mech, Accessed 14 February 2020.
32
E. Ranzi, C. Cavallotti, A. Cuoci, A. Frassoldati, M. Pelucchi and T. Faravelli, “New reaction classes in the kinetic modeling of low temperature oxidation of n-alkanes,” Combustion and flame, 162, No. 5, 2015, pp. 1679-1691.
33
H. Wang, X. You, A. Joshi, S. Davis, A. Laskin and F. Egolfopoulos, USC Mech Version II, May 2007,High-Temperature Combustion Reaction Model of H2/CO/C1-C4 Compounds, http://ignis.usc.edu/USC_Mech_II.htm, Accessed 14 February 2020
34
G. Smith, Y. Tao and H. J. e. Wang, accessed July, Foundational Fuel Chemistry Model Version 1.0 (FFCM-1), 2016, http://nanoenergy.stanford.edu/ffcm1, Accessed 16 February 2020.
35
F. Wang, P. Li, Z. Mei, J. Zhang and J. Mi, “Combustion of CH4/O2/N2 in a well stirred reactor,” Energy, 72, 2014, pp. 242-253.
36
Y. Liu, C. Zou, J. Cheng, H. Jia and C. Zheng, “Experimental and numerical study of the effect of CO2 on the ignition delay times of methane under different pressures and temperatures,” Energy & fuels, 32, No. 10, 2018, pp. 10999-11009.
37
M. Fürst, P. Sabia, M. Lubrano Lavadera, G. Aversano, M. De Joannon, A. Frassoldati and A. Parente, “Optimization of chemical kinetics for methane and biomass pyrolysis products in moderate or intense low-Oxygen dilution combustion,” Energy & fuels, 32, No. 10, 2018, pp. 10194-10201.
38
S. Zabarnick and J. Zelina, “Chemical kinetics of NOx production in a well stirred reactor,” Intersociety Energy Conversion Engineering Conference, Monterey, California, United States, August 1994.
39
Y. Xie, J. Wang, M. Zhang, J. Gong, W. Jin and Z. J. E. Huang, “Experimental and numerical study on laminar flame characteristics of methane oxy-fuel mixtures highly diluted with CO2,” Fuels, 27, No. 10, 2013, pp. 6231-6237.
40
A. Cavaliere and M. de Joannon, "Progress in Energy and Combustion science," Mild combustion, 30, No. 4, 2004, pp. 329-366.
41
N. Donohoe, A. Heufer, W. K. Metcalfe, H. J. Curran, M. L. Davis, O. Mathieu, D. Plichta, A. Morones, E. L. Petersen and F. Güthe, "Ignition delay times, laminar flame speeds, and mechanism validation for natural gas/hydrogen blends at elevated pressures," Combustion and Flame, 161, No. 6, 2014, pp. 1432-1443.
42
M. De Joannon, A. Cavaliere, R. Donnarumma and R. Ragucci, "Dependence of autoignition delay on oxygen concentration in mild combustion of high molecular weight paraffin," Proceedings of the Combustion Institute, 29, No. 1, 2002, pp. 1139-1146.
43
P. R. Medwell, P. A. Kalt and B. B. Dally, “Simultaneous imaging of OH, formaldehyde, and temperature of turbulent nonpremixed jet flames in a heated and diluted coflow,” Combustion and Flame, 148, No. 1-2, 2007, pp. 48-61.
44
A. Parente, C. Galletti and L. Tognotti, “Effect of the combustion model and kinetic mechanism on the MILD combustion in an industrial burner fed with hydrogen enriched fuels,” International journal of hydrogen energy, 33, No. 24, 2008, pp. 7553-7564.
45
M. Baigmohammadi, V. Patel, S. Martinez, S. Panigrahy, A. Ramalingam, U. Burke, K. P. Somers, K. A. Heufer, A. Pekalski and H. J. Curran, “A Comprehensive Experimental and Simulation Study of Ignition Delay Time Characteristics of Single Fuel C1–C2 Hydrocarbons over a Wide Range of Temperatures, Pressures, Equivalence Ratios, and Dilutions,” Energy & Fuels, 34, No. 3, 2020, pp. 3755-3771.
46
C. Zheng and Z. Liu, Oxy-fuel Combustion: Fundamentals, Theory and Practice, First Edition, Masachusetts, Academic Press, 2017.
47
M. J. Evans, P. R. Medwell, Z. F. Tian, A. Frassoldati, A. Cuoci and A. Stagni, “Ignition characteristics in spatially zero-, one-and two-dimensional laminar ethylene flames,” AIAA Journal, Vol. 54, 2016, pp. 3255-3264.
48
K. Ashwani and T. H. Gupta, “High temperature air combustion: flame characteristics, challenges and opportunities, Proceeding of Beijing Symposium on High Temperature Air Combustion, Beijing University, Beijing, China, October 1999, pp. 10-28.
49
A. K. Gupta, “Thermal characteristics of gaseous fuel flames using high temperature air,” J. Eng. Gas Turbines Power, 126, No. 1, 2004, pp. 9-19.
50
V. Nori and J. Seitzman, Evaluation of chemiluminescence as a combustion diagnostic under varying operating conditions, 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, United States, January 2008.
51
V. N. Nori and J. M. Seitzman, “CH∗ chemiluminescence modeling for combustion diagnostics,” Proceedings of the Combustion Institute, 32, No. 1, 2009, pp. 895-903.
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ORIGINAL_ARTICLE
بررسی تاثیر زاویه همگرایی-واگرایی بر مشخصههای احتراقی مخلوط پیشآمیخته هیدروژن - هوا در یک میکرولوله همگرا – واگرا
در مطالعه حاضر، مشخصههای احتراقی مخلوط پیشآمیخته هیدروژن-هوا در میکرولولههای همگرا-واگرا، با استفاده از شبیهسازی عددی فرایند احتراق، بررسی شده است. هدف این پژوهش بررسی تاثیر سرعت جریان ورودی و زاویه همگرایی-واگرایی بر مشخصههای احتراقی شامل بیشینه دمای شعله، موقعیت شعله، حدشعلهوری بالا و ضخامت شعله در قطر در محدوده قطر خاموشی شعله است. معادلات حاکم بهصورت سهبعدی و گذرا درنظر گرفته شدهاند و از مکانیزم شیمیایی جزئی واکنش هیدروژن و هوا استفاده شد. نتایج نشان دادند که سرعت جریان ورودی بر موقعیت شعله درون میکرولوله تاثیر میگذارد و بیشینه دمای شعله متاثر از موقعیت قرارگیری شعله درون میکرولوله تغییر میکند. کمترین دمای شعله در یک نسبت همارزی مشخص زمانی ایجاد میشود که شعله در قسمت گلوگاه قرار گرفته باشد. مشخص شد که سرعت جریان ورودی و قسمت گلوگاه تاثیر مستقیمی بر ضخامت و کشیدگی شعله دارند. افزایش ضخامت و کشیدگی شعله در سرعتهای زیاد، برای میکرولولههای با قطر گلوگاه کم، موجب بیرون زدن قسمتی از ناحیه احتراق از میکرولوله و درنهایت خارج شدن از حد شعلهوری بالا میشود. از مقایسه نتایج با یک میکرولوله با مقطع ثابت و ابعاد مشابه مشخص شد که ایجاد ناحیه گلوگاه در میکرولولهها موجب افزایش حد شعلهوری بالا در آنها میشود.
https://www.jfnc.ir/article_114428_d1da27b27b184ade4364e62eccfa6203.pdf
2020-09-22
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میکرولوله همگرا واگرا
حد شعلهوری بالا
ضخامت شعله
پویان
عباسپور
pouabbaspour@gmail.com
1
دانشجو، رشته مهندسی مکانیک، دانشگاه شهید چمران اهواز، اهواز
AUTHOR
علیرضا
علی پور
a.alipoor@shirazu.ac.ir
2
استادیار، گروه حرارت و سیالات، دانشکده مهندسی مکانیک، دانشگاه شیراز، شیراز
LEAD_AUTHOR
یوسف
تمثیلیان
tamsilian@scu.ac.ir
3
دانشگاه شهید چمران اهواز، دانشکده مهندسی، گروه مهندسی نفت، گاز و پتروشیمی
AUTHOR
D. G. Norton and D. G. Vlachos, “Combustion characteristics and flame stability at the microscale: a CFD study of premixed methane/air mixtures,” Chemical Engineering Science, 58, 2003, pp. 4871-4882.
1
D.G. Norton and D.G. Vlachos, “a CFD study of propane/air micro flame stability,” Combustion and Flame, 38, 2004, pp. 97-107.
2
J. Li, S. K. Chou, Z. W. Li and W. M. Yang, “A comparative study of H2-air premixed flame in micro combustors with different physical and boundary conditions,” Combustion Theory and Modeling, 12, 2008, pp. 325-347.
3
J. Li, S. K. Chou, W. M. Yang and Z. W. Li, “A numerical study on premixed micro-combustion of CH4-air mixture: Effects of combustor size, geometry and boundary conditions on flame temperature,” Chemical Engineering Journal, 150, 2009, pp. 213-222.
4
J. Zarvandi, S. Tabejammat and M. R. Baig Mohammadi, “Numerical simulation of the effective parameters on the stability of stoichiometric C /air premixed combustion in a micro – combustion chamber,” Fuel and Combustion, 3, No. 2, 2010, pp. 31- 45. (In Persian)
5
G. Pizza, C. E. Frouzakis, J. Mantzaras, A. G. Tomboulides and K. Boulouchos, “Dynamics of premixed hydrogen/air flames in microchannels,” Combustion and Flame, 152, 2008, pp. 433-450.
6
G. Pizza, C. E. Frouzakis, J. Mantzaras, A. G. Tomboulides and K. Boulouchos, “Dynamics of premixed hydrogen/air flames in mesoscale channels,” Combustion and Flame, 155, 2008, pp. 2-20.
7
G. Pizza, C. E. Frouzakis, J. Mantzaras, A. G. Tomboulides and K. Boulouchos, “Three-dimensional simulations of premixed hydrogen/air flames in microtubes,” J. Fluid Mech, 658, 2010, pp. 463-491.
8
A. Alipoor, K. Mazaheri and A. Shamoonipour, “Dynamics of lean hydrogen/air flame regimes in micro scale combustion,” Modares Mechanical Engineering, 14, No. 3, 2014, pp. 94 – 102. (In Persian)
9
A. Alipoor and K. Mazaheri,” Numerical study of the inlet velocity effect on characteristics of repetitive extinction – ignition dynamics for lean premixed hydrogen – air combustion in a heated micro channel,” Fuel and Combustion, 8, No. 2, 2015, pp. 33 – 54. (In Persian)
10
A. Alipoor and K. Mazaheri, “Bifurcation of propagating Flame in repetitive extinction – ignition phenomenon in premixed Hydrogen – air combustion in a heated micro channel,” J. Mechanical Engineering University of Tabriz, 46, No. 2, 2016, pp. 73 – 85. (In Persian)
11
A. Tang, Y. Xu, C. Shan, J. Pan and Y. Liu, “A comparative study on combustion characteristics of methane, propane and hydrogen fuels in a micro-combustor,” International J. Hydrogen Energy, 40, 2015, pp. 16587-16596.
12
W. M. Yang, S. K. Chou, C. Shu, Z. W. Li and H. Xue, “Combustion in a micro-cylindrical combustor with and without a backward facing step,” Applied Thermal Engineering, 22, 2002, pp. 1777-1787.
13
J. Li, S. K. Chou, G. Huang, W. M. Yang and Z. W. Li, “Study on premixed combustion in cylindrical micro combustors: Transient flame behavior and wall heat flux,” Experimental Thermal and Fluid Science, 33, 2009, pp. 764-773.
14
H. Faramarzpour, K. Mazaheri and A. Alipoor, “The Numerical Investigation of Physical and Geometrical Conditions of Combustor and Mixture on Flame Stability in Micro Burner and Their Effects on Radiation Efficiency,” Fuel and Combustion, 9, 2016, pp. 59-74. (In Persian)
15
MH. Saberi Moghadam, K. Mazaheri and A. Alipoor,” Numerical study of bluff body effect on lean premixed hydrogen/air combustion in a micro – scale combustor,” Modares Mechanical Engineering, 14, No. 13, 2015, pp. 86-94. (In Persian)
16
A. Alipoor and MH. Saidi,” Improvement of combustion characteristics for hydrogen – air mixture using modular structure in a novel micro combustor,” Fuel and Combustion, 12, No. 4, 2019, pp. 1–13. (In Persian)
17
M. Akram and S. Kumar, “Experimental studies on dynamics of methane-air premixed flame in meso-scale diverging channels,” Combustion and Flame, 158, 2011, pp. 915-924.
18
H. R. Askarifard Jahromi and S. Hossainpour, “Numerical study of propane-air combustion stability in a diverging micro channel,” Fuel and Combustion, 7, 2014, pp. 17-30. (In Persian)
19
B. Khandelwal and S. Kumar, “Experimental investigations on flame stabilization behavior in a diverging micro channel with premixed methane – air mixtures,” Applied Thermal Engineering, 30, 2010, pp. 2718-2723.
20
W. Yang, C. Deng, J. Zhou, J. Liu, Y. Wang and K. Cen, “Experimental and numerical investigations of hydrogen-air premixed combustion in a converging-diverging micro tube,” International Journal of Hydrogen Energy, 39, 2014, pp. 3469-3476.
21
S. Biswas, P. Zhang, H. Wang and L. Qiao, “Propagation and extinction behavior of methane/air premixed flames through straight and converging-diverging microchannels,” Applied Thermal Engineering, 148, 2019, pp. 1395-1406.
22
S. R. Turns and S. J. Mantel, An Introduction to Combustion, Second Edition, New York, McGraw Hill, 2000.
23
R. A. Yetter, F. L. Dryer and H. Rabitz, “A comprehensive reaction mechanism for carbon monoxide/hydrogen/oxygen kinetics,” Combustion Science and Technology, 79, 1991, pp. 97-128.
24
[Online], <https://www.tue.nl/combustion/home.php>, [April 2012].
25
[Online], <http://combustion.berkeley.edu/gri_mech/data/nasa_plnm.html>, [13 May 2019].
26
T. Poinsot and D. Veynante, Theoretical and Numerical Combustion, Second Edition, Philadelphia, Edwards, 2005.
27
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ORIGINAL_ARTICLE
شبیهسازی و تحلیل عددی یک موتور اسکرمجت نمونه (دی ال ار) در شرایط احتراقی و غیر احتراقی
در این مقاله، فرایند احتراق در یک موتور اسکرم جت نمونه (DLR) از دیدگاه عددی شبیه سازی و تحلیل شده است. برای انجام این مدل سازی ابتدا این موتور برای حالت غیراحتراقی شبیهسازی و اعتبارسنجی شده است. نتایج این بخش نشان می دهد که روش استفاده شده توانایی پیشبینی میدانهای سرعت و فشار را با دقت مناسبی دارد. در ادامه مسئله با درنظرگرفتن فرایند احتراق و با درنظرگرفتن یک واکنش شیمیایی شبیهسازی شده است. نتایج حاصل از دو تحلیل انجام شده نشان میدهد که در حالت احتراقی ناحیه فروصوت تا فاصله 141 میلیمتری از پشت مانع ادامه دارد، این در حالی است که برای حالت غیراحتراقی این فاصله تنها 22 میلی متر است. در حالت غیراحتراقی موج ها پس از برخورد با جت با اندکی انحراف از آن عبور می کنند، در حالی که در حالت احتراقی موج ها بعد از برخورد با جت بازتاب داده می شوند.
https://www.jfnc.ir/article_118511_40662d3368fa22c428d4739d8855e6fc.pdf
2020-09-22
45
62
احتراق مافوق صوت
اسکرمجت
شبیهسازی عددی
جریان آشفته
جاماسب
پیرکندی
jpirkandi@mut.ac.ir
1
عضو هیات علمی / دانشگاه صنعتی مالک اشتر
LEAD_AUTHOR
مصطفی
محمودی
mostafamahmoodi@mut.ac.ir
2
عضو هیات علمی / دانشگاه صنعتی مالک اشتر
AUTHOR
K. Roberts and D. Wilson, “Analysis and design of a hypersonic scramjet engine with a transition Mach number of 4.00,” 47th AIAA aerospace sciences meeting including the new horizons forum and aerospace exposition, Orlando, Florida, 2009, pp. 1-25.
1
J. Urzay, “Supersonic combustion in air-breathing propulsion systems for hypersonic flight,” Annual Review of Fluid Mechanics, 50, 2018, pp. 593-627.
2
G. Y. Anderson and P. B. Gooderum, “Exploratory tests of two strut fuel injectors for supersonic combustion,” NASA Technical note, 1974.
3
R. Boyce, S. Gerard and A. Paull, “The HyShot scramjet flight experiment-flight data and CFD calculations compared,” in 12th AIAA International Space Planes and Hypersonic Systems and Technologies, Norfolk, Virginia, 2003, pp. 1-8.
4
R. Boyce, A. Paull, R. Stalker, M. Wendt, N. Chinzei and H. Miyajima, “Comparison of supersonic combustion between impulse and vitiation-heated facilities,” Journal of Propulsion and Power, 16, No. 4, 2000, pp. 709-717.
5
D. B. Le, C. P. Goyne, R. H. Krauss and J. C. McDaniel, “Experimental study of a dual-mode scramjet isolator,” Journal of Propulsion and Power, 24, No. 5, 2008, pp. 1050-1057.
6
D. J. Micka and J. F. Driscoll, “Combustion characteristics of a dual-mode scramjet combustor with cavity flameholder,” Proceedings of the combustion institute, 32, No. 2, 2009, pp. 2397-2404.
7
D. Scherrer, O. Dessornes, M. Ferrier, A. Vincent-Randonnier, Y. Moule and V. Sabel'Nikov, “Research on supersonic combustion and scramjet combustors at ONERA,”Aerospacelab Journal, No 11, pp. 1-20, 2016.
8
A. Storch, M. Bynum, J. Liu and M. Gruber, “Combustor operability and performance verification for HIFiRE flight 2,” 17th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, San Francisco, California, 2011, pp. 1-13.
9
M. Suraweera, D. Mee and R. Stalker, “Skin friction reduction in hypersonic turbulent flow by boundary layer combustion,” 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 2005, pp. 1-11.
10
Z. Zhong-hua Le Jia-ling, “Parallel Modeling of Three-Dimensional Scramjet Combustor and Comparisons with Experiment’s Results,” Theoetical and Applied Mechanics Conference, China Aerodynamics Research & Development Center, 2002.
11
W. Waidmann, F. Alff, U. Brummund, M. Böhm, W. Clauss and M. Oschwald, “Experimental investigation of the combustion process in a supersonic combustion ramjet (SCRAMJET),” DGLR Jahrbuch Conference, Germany, 1994, pp. 1-10.
12
M. Berglund and C. Fureby, “LES of supersonic combustion in a scramjet engine model,” Proceedings of the Combustion Institute, 31, No. 2, 2007, pp. 2497-2504.
13
W. Huang, “Investigation on the effect of strut configurations and locations on the combustion performance of a typical scramjet combustor,” Journal of Mechanical Science and Technology, 29, No. 12, 2015, pp. 5485-5496.
14
W. Huang, Z. Wang, S. Luo and J. Liu, “Parametric effects on the combustion flow field of a typical strut-based scramjet combustor,” Chinese science bulletin, 56, No. 35, 2011, pp. 3871-3877.
15
S. Kumar, S. Das and S. Sheelam, “Application of CFD and the Kriging method for optimizing the performance of a generic scramjet combustor,” Acta Astronautica, 101, 2014, pp. 111-119.
16
S. Menon, F. Genin, and B. Chernyavsky, “Large eddy simulation of scramjet combustion using a subgrid mixing/combustion model,” 12th AIAA international space planes and hypersonic systems and technologies, Virginia, 2003, pp. 1-14.
17
M. Oevermann, “Numerical investigation of turbulent hydrogen combustion in a SCRAMJET using flamelet modeling,” Aerospace science and technology, 4, No. 7, 2000, pp. 463-480.
18
A. Potturi and J. Edwards, “LES/RANS simulation of a supersonic combustion experiment,” 50th AIAA aerospace sciences meeting including the new horizons forum and aerospace exposition, Nashville, Tennessee, 2012, pp. 1-20.
19
J. f. Zou, Y. Zheng and O. Z. Liu, “Simulation of turbulent combustion in DLR Scramjet,” Journal of Zhejiang University-SCIENCE A, 8, No. 7, 2007, pp. 1053-1058.
20
M. Zahedzadeh and F. Ami, “The numerical study of the gas flow in a nozzle of sctemjet,” The 16th International Conference of Iran Airspace Associations, Tehran, 2017. (In Persian)
21
M. Zahedzadeh and F. Ami, “The numerical study of the cross injection in the supersonic combustion chamber of a scramjet engine,” Technology in airspace engineering, 2, No. 1, 2017, pp. 1-8. (In Persian)
22
S. Mousavi and S. Tabe Jamat, “The analysis of supersonic combustion chamber simulation of a scramjet engine,” The 10th Conference of Iran airspace association, Tehran, 2011. (In Persian)
23
A. Miettinen and T. Siikonen, “Application of pressure- and density-based methods for different flow speeds,” International Journal for Numerical Methods in Fluids, 79, No. 5, 2015, pp. 243-267.
24
R. Milligan, D. Eklund, J. Wolff, T. Mathur and M. Gruber, “Dual mode scramjet combustor: analysis of two configurations,” 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, Florida, 2010, pp. 1-19.
25
B. J. Bornhoft, E. Hassan, D. Peterson and E. Luke, “Reacting Dynamic Hybrid Reynolds-Averaged Navier-Stokes/Large-Eddy-Simulation of a Round Dual Mode Scramjet Combustor,” AIAA Aviation 2019 Forum, Dallas, Texas, 2019, pp. 1-12.
26
R. Baurle, T. Mathur, M. Gruber and K. Jackson, “A numerical and experimental investigation of a scramjet combustor for hypersonic missile applications,” 34th AIAA/ASME/SAE/ASEE joint propulsion conference and exhibit, USA,1998, pp. 1-17.
27
A. Ingenito, “Theoretical investigation of air vitiation effects on hydrogen fuelled scramjet performance,” International Journal of Hydrogen Energy, 40, No. 6, 2015, pp. 2862-2870.
28
K. M. Pandey and S. Roga, “CFD Analysis of Hypersonic Combustion of H2-Fueled Scramjet Combustor with Cavity Based Fuel Injector at Flight Mach 6,” in Applied Mechanics and Materials, 656, 2014, pp. 53-63.
29
H. Zhang, N. Wang, Z. Wu, W. Han and R. Du, “A new model of regression rate for solid fuel scramjet,” International Journal of Heat and Mass Transfer, 144, 2019, pp. 118645.
30
G. Choubey and K. Pandey, “Effect of different strut+ wall injection techniques on the performance of two-strut scramjet combustor,” International Journal of Hydrogen Energy, 42, No. 18, 2017, pp. 13259-13275.
31
G. Choubey and K. Pandey, “Effect of different wall injection schemes on the flow-field of hydrogen fuelled strut-based scramjet combustor,” Acta Astronautica, 145, 2018, pp. 93-104.
32
O. R. Kummitha, K. M. Pandey and R. Gupta, “CFD analysis of a scramjet combustor with cavity based flame holders,” Acta Astronautica, 144, 2018, pp. 244-253.
33
O. R. Kummitha, L. Suneetha and K. Pandey, “Numerical analysis of scramjet combustor with innovative strut and fuel injection techniques,” International Journal of Hydrogen Energy, 42, No. 15, 2017, pp. 10524-10535.
34
W. Huang, “Design exploration of three-dimensional transverse jet in a supersonic crossflow based on data mining and multi-objective design optimization approaches,” international journal of hydrogen energy, 39, No. 8, 2014, pp. 3914-3925.
35
W. Huang, “Effect of jet-to-crossflow pressure ratio arrangement on turbulent mixing in a flowpath with square staged injectors,” Fuel,144, 2015, pp. 164-170.
36
W. Huang, W. d. Liu, S. b. Li, Z. x. Xia, J. Liu and Z. g. Wang, “Influences of the turbulence model and the slot width on the transverse slot injection flow field in supersonic flows,” Acta Astronautica, 73, 2012, pp. 1-9.
37
G. Choubey and K. Pandey, “Effect of variation of angle of attack on the performance of two-strut scramjet combustor,” international journal of hydrogen energy, 41, No. 26, 2016, pp. 11455-11470.
38
G. Choubey and K. Pandey, “Investigation on the effects of operating variables on the performance of two-strut scramjet combustor,” International Journal of Hydrogen Energy, 41, No. 45, 2016, pp. 20753-20770.
39
O. R. Kummitha, “Numerical analysis of hydrogen fuel scramjet combustor with turbulence development inserts and with different turbulence models,” International Journal of Hydrogen Energy, 42, No. 9, 2017, pp. 6360-6368.
40
O. R. Kummitha, K. Pandey and R. Gupta, “Numerical analysis of hydrogen fueled scramjet combustor with innovative designs of strut injector,” International Journal of Hydrogen Energy, 45, No. 25, 2020, pp.13659-13671.
41
J. Shin and H. G. Sung, “Combustion characteristics of hydrogen and cracked kerosene in a DLR scramjet combustor using hybrid RANS/LES method,” Aerospace Science and Technology, 80, 2018, pp. 433-444.
42
Y. Bartosiewicz, Z. Aidoun and Y. Mercadier, “Numerical assessment of ejector operation for refrigeration applications based on CFD,” Applied Thermal Engineering, 26, No. 5, 2006, pp. 604-612.
43
J. Shin, K. H. Moon and H.-G. Sung, “Numerical Simulation of Hydrogen Combustion in Model SCRAMJET Combustor Using IDDES Framework,” 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, Glasgow, Scotland, 2015, pp. 1-12.
44
G. Constantinescu and K. Squires, “LES and DES investigations of turbulent flow over a sphere,” 38th Aerospace Sciences Meeting and Exhibit, Reno, NV, USA, 1999, pp. 1-11.
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ORIGINAL_ARTICLE
مطالعه تجربی تاثیر نسبت انسداد انژکتور کم چرخش بر حدود پایداری و رژیم های احتراقی شعله گاز طبیعی
در این مطالعه، به بررسی تاثیر نسبت انسداد چرخاننده کم چرخش بر حدود پایداری و رژیم های احتراقی شعله پرداخته می شود. نسبت انسداد برابر سطح مسدود و پوشیده صفحه مغشوش کننده به کل مساحت آن است و یکی از پارامترهای اصلی چرخاننده کم چرخش است که تاثیر مهمی بر پایداری شعله کم چرخش دارد. به منظور بررسی تاثیر نسبت انسداد کانال مرکزی چرخاننده بر پایداری، 9 چرخاننده با هندسه متمایز مورد بررسی قرار گرفتند. نتایج نشان داد که با افزایش نسبت انسداد، حد خاموشی چرخاننده ها کاهش می یابد، به طوری که با افزایش نسبت انسداد از 43% تا 76%، میزان حد خاموشی تا حدود 25% کاهش یافته و پایداری شعله بهبود می یابد. همچنین، در این مطالعه مشاهده شد که با افزایش نسبت هم ارزی، شعله یک فرایند گذار را طی می کند که در آن شعله از یک حالت Vشکل (کاسه ای شکل) معلق پایدار تا حالت گردابه ای شکل متصل به دهانه مشعل پیش می رود. فرایند گذار را میتوان به سه رژیم احتراقی متفاوت تقسیم کرد که حدود این رژیم های احتراقی براساس نسبت هم ارزی و میزان عدد رینولدز ورودی مشعل تعیین میشود. بررسی میزان آلاینده چرخاننده ها نشان داد که میزان با افزایش نسبت هم ارزی افزایش می یابد و در نسبت های هم ارزی نزدیک 1 میزان در حدود ppm20 است.
https://www.jfnc.ir/article_118642_df8abee04874be7a3032b6efd9a89936.pdf
2020-09-22
63
79
احتراق کم چرخش
پایداری شعله
نسبت انسداد
گاز طبیعی
نوید
حشمتی
na.heshmati@mail.sbu.ac.ir
1
کارشناس ارشد هوافضا-پیشرانش
AUTHOR
سید مهدی
میرساجدی
m_mirsajedi@sbu.ac.ir
2
استادیار گروه مهندسی هوافضا دانشکده فناوریهای نوین دانشگاه شهید بهشتی
LEAD_AUTHOR
D. T. Yegian and R. K. Cheng, “Stability characteristics and emission levels of a laboratory hot water heater utilizing a weak-swirl burner,” American Flame Research Council Fall International Symposium, Berkeley, California, USA, 1995.
1
N. Syred and J. M. Beér, “Combustion in swirling flows: A review,” Combustion and Flame, 23, No. 2, 1974, pp. 143-201.
2
C. K. Chan, K. S. Lau, W. K. Chin and R. K. Cheng RK, “Freely propagating open premixed turbulent flames stabilized by swirl,” Symposium (International) on Combustion, 24, No. 1, 1992, pp. 511–518.
3
D. T. Yegian and R. K. Cheng, Development of a vane-swirler for use in a low NOx weak-swirl burner, Office of Scientific and Technical Information (OSTI), Technical Report, DE97001252, 1996.
4
D. T. Yegian, R. K. Cheng, “Scaling the weak-swirl burner from 15 kW to 1 MW,” Combustion Institute meeting, Berkely, California, United States, 1998.
5
R. K. Cheng, D. T. Yegian, M. M. Miyasato, G. S. Samuelsen, C. E. Benson, R. Pellizzari and et al, “Scaling and development of low-swirl burners for low-emission furnaces and boilers”, Proceedings of the Combustion Institute, 28, No. 1, 2000, pp. 1305–1313.
6
M. R. Johnson, D. Littlejohn, W. A. Nazeer, K. O. Smith and R. K. Cheng, “A comparison of the flowfields and emissions of high-swirl injectors and low-swirl injectors for lean premixed gas turbines,” Proceedings of the Combustion Institute, 30, No. 2, 2005, pp. 2867–2874.
7
M. Farshchi and N. D. Tohidi ND, “Experimental Investigation of a lean premixed low swirl burner emissions,” 3rd Fuel and Combustion Conference of Iranian Combustion Institute, Tehran, Iran, 2010. (in Persian)
8
M. Shahsavari and M. Farshchi, “Experimental Investigation of the effects of geometrical parameters of low swirl burner on flame stability,” 10th International Conference of Iranian Aerospace Society, Tehran, Iran, 2011. (in Persian)
9
M. Shahsavari and M. Farshchi, “Stability Characteristics and NOx Emissions of Low Swirl Flames,” Fuel and Combustion, 5, No. 2, 2013, pp. 59-75. (in Persian)
10
S. I. Pishbin, S. M. Modares Razavi and M. Ghazikhani, “Investigation of the effects of performance parameters on the flame behavior and temperature distribution and exergy analysis of low swirl premixed burners,” Modares Mechanical Engineering, 14, 2014, pp. 27-38. (in Persian)
11
P. L. Therkelsen, D. Littlejohn and R. K. Cheng, “Parametric Study of Low-Swirl Injector Geometry on its Operability”, Volume 2: Combustion, Fuels and Emissions, Parts A and B. Presented at the ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, Copenhagen, Denmark, 2012.
12
A. A. Verbeek, T. W. F. M. Bouten, G. G. M. Stoffels, B. J. Geurts and T. H. van der Meer, “Fractal turbulence enhancing low-swirl combustion,” Combustion and Flame, 162, 2015, pp. 129-143.
13
A. A. Verbeek, P. A. Willems, G. G. M. Stoffels, B. J. Geurts and T. H. van der Meer, “Enhancement of turbulent flame speed of V-shaped flames in fractal-grid-generated turbulence,” Combustion and Flame, 167, 2016, pp. 97-112.
14
G. D. ten Thij, A. A. Verbeek and T. H. van der Meer, “Application of Fractal Grids in Industrial Low-Swirl Combustion,” Flow, Turbulence and Combustion, 96, 2016, pp. 801-818.
15
M. Nahvi, K. Mazaheri, M. M. Parsafar and A. Mohammadpour, “Experimental analysis of blockage effect on low-swirl burner combustion parameters for lean premixed natural gas-air flames,” 18th Fluid Dynamics Conference, Mashhad, Iran, 2019.
16
A. Frank, P. Therkelsen, M. Sierra Aznar, V. H. Rapp, R. K. Cheng and J. Y. Chen, “Investigation of the Down-Scaling Effects on the Low Swirl Burner and its Application to Microturbines,” ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, Oslo, Norway, 2018.
17
J. M. Beér and N. A. Chigier, “Combustion Aerodynamics,” New York, Halsted Press Division. Wiley, 1972.
18
R. K. Cheng, S. A. Fable, D.Schmidt, L. Arellano, K. O. Smith, “Development of a low swirl injector concept for gas turbines,” International Joint Power Conference, 2001.
19
N. Heshmati, Design and Development of A Premixed Low Swirl Burner with The Approach of Applying The LSB In Microturbines, Msc Disseration, Department of New Technologies Engineering, Tehran: Shahid Beheshti University, 2019. (in Persian)
20
N. Heshmati and S. M. Mirsajedi, “Experimental Investigation of low swirl burner flame stability,” 4th National Conference of Iranian Aerospace Propulsion Association, 2018. (in Persian)
21
D. Littlejohn, R. K. Cheng, D. R. Noble and T. Lieuwen, “Laboratory Investigations of Low-Swirl Injectors Operating With Syngases,” Journal of Engineering for Gas Turbines and Power, 132, 2010, pp. 30-38.
22
D. Beerer, Combustion characteristics and performance of low-swirl injectors with natural gas and alternative fuels at elevated pressures and temperatures, PhD Disseration, Department of Aerospace Engineering, Irvine: University of California, 2013.
23
R. K. Cheng, D. Littlejohn, P. A. Strakey and T. Sidwell, “Laboratory investigations of a low-swirl injector with H2 and CH4 at gas turbine conditions,” Proceedings of the Combustion Institute, 32, 2009, pp. 3001-3009.
24
R. K. Cheng, D. Littlejohn, W. A. Nazeer, K. O. Smith, “Laboratory Studies of the Flow Field Characteristics of Low-Swirl Injectors for Adaptation to Fuel-Flexible Turbines,” Volume 1: Combustion and Fuels, Education. Presented at the ASME Turbo Expo 2006: Power for Land, Sea, and Air, Barcelona, Spain, 2006.
25
ORIGINAL_ARTICLE
تبخیر گذرای قطره دوجزئی در دما و فشار زیاد
در این مقاله، تبخیر گذرای قطره دوجزئی در دما و فشار زیاد به صورت عددی مدلسازی شده است. در فاز گاز، معادلات بقای جزء، تکانه و انرژی و در فاز مایع، معادلات بقای جزء و انرژی، با رویکرد حجم محدود حل شدهاند. تغییرات خواص ترموفیزیکی برحسب دما و فشار درنظر گرفته شده است. همچنین فرض تعادل فوگاسیتی در سطح مشترک و معادله حالت پنگ-رابینسون لحاظ شده است. قطره کروی فرض شده و از انحلالپذیری گاز در مایع و اثرات شتاب گرانش صرفنظر شده است. نتایج مدل برای قطره دوجزئی هپتان-هگزادکان درگسترههای دمایی و فشاری گسترده اعتبارسنجی شدند و مطابقت خوبی با دادههای تجربی موجود در ادبیات نشان دادند. اثر تغییرات فشار در دماهای مختلف بر تبخیر قطره بررسی شد. مشاهده شد که در یک دمای ثابت با افزایش فشار تا 2 مگاپاسکال، عمر قطره افزایش یافته ولی افزایش فشار به 5/2 مگاپاسکال منجربه کاهش عمر قطره میشود. رفتار تبخیری قطره با ترکیبات مختلف تغییری نداشت. نقش معادلات حالت مختلف بر پیشبینی عمر قطره مطالعه شده و درنهایت تأثیر فشار و دمای محیط بر فوق بحرانیشدن دمای سطح قطره بررسی و مشاهده شد که در فشار و دمای به اندازه کافی زیاد قطره میتواند به حالت بحرانی برسد.
https://www.jfnc.ir/article_118643_16c058f9bc9f40502dfc220037464d63.pdf
2020-09-22
81
99
تبخیر قطره
دوجزئی
فشار زیاد
فوگاسیتی
پنگ-رابینسون
مهنا
مرادی
mohana.moradi.1994@gmail.com
1
گروه هوافضا، دانشکده مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران،
AUTHOR
حجت
قاسمی
h_ghassemi@iust.ac.ir
2
دانشگاه علم و صنعت ایران-دانشکده مهندسی مکانیک
LEAD_AUTHOR
D. Spalding, “Theory of particle combustion at high pressures,” ARS journal, 29, No. 11, 1959, pp. 828-835.
1
J. A. Manrique and G. L. Borman, “Calculations of steady state droplet vaporization at high ambient pressures,” International Journal of Heat and Mass Transfer, 12, No. 9, 1969, pp. 1081-1095.
2
R. Matlosz, S. Leipziger and T. Torda, “Investigation of liquid drop evaporation in a high temperature and high pressure environment,” International Journal of Heat and Mass Transfer, 15, No. 4, 1972, pp. 831-852.
3
T. Kadota and H. Hiroyasu, “Evaporation of a single droplet at elevated pressures and temperatures: 2nd report, theoretical study,” Bulletin of JSME, 19, No. 138, 1976, pp. 1515-1521,.
4
G. Zhu and S. Aggarwal, “Transient supercritical droplet evaporation with emphasis on the effects of equation of state,” International Journal of Heat and Mass Transfer, 43, No. 7, 2000, pp. 1157-1171.
5
E. Curtis and P. Farrell, “A numerical study of high-pressure droplet vaporization,” Combustion and Flame, 90, No. 2, 1992, pp. 85-102.
6
E. Curtis and P. Farrell, “Droplet vaporization in a supercritical microgravity environment,” Acta Astronautica, 17, No. 11-12, 1988, pp. 1189-1193.
7
H. Kim and N. Sung, “The effect of ambient pressure on the evaporation of a single droplet and a spray,” Combustion and Flame, 135, No. 3, 2003, pp. 261-270.
8
J. Jin and G. Borman, “A model for multicomponent droplet vaporization at high ambient pressures,” SAE Technical Paper, 0148-7191, 1985.
9
J. Stengele, H. J. Bauer and S. Wittig, “Numerical study of bicomponent droplet vaporization in a high pressure environment,” ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition, American Society of Mechanical Engineers Digital Collection, New York, 1996.
10
S. Aggarwal, Z. Shu, H. Mongia and H. Hura, “Multicomponent and single-component fuel droplet evaporation under high pressure conditions,” 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, University of Illinois, Chicago, 1998.
11
M. Burger, R. Schmehl, K. Prommersberger, O. Schäfer, R. Koch and S. Wittig, “Droplet evaporation modeling by the distillation curve model: accounting for kerosene fuel and elevated pressures,” International journal of heat and mass transfer, 46, No. 23, 2003, pp. 4403-4412.
12
H. Zhang, V. Raghavan and G. Gogos, “Subcritical and supercritical droplet evaporation within a zero-gravity environment: Low Weber number relative motion,” International Communications in Heat and Mass Transfer, 35, No. 4, 2008, pp. 385-394.
13
W. Long, P. Yi, M. Jia, L. Feng and J. Cui, “An enhanced multi-component vaporization model for high temperature and pressure conditions,” International Journal of Heat and Mass Transfer, 90, 2015, pp. 857-871.
14
C. Verwey and M. Birouk, “Fuel vaporization: Effect of droplet size and turbulence at elevated temperature and pressure,” Combustion and Flame, 189, 2018, pp. 33-45.
15
S. Srivastava and F. Jaberi, “Large eddy simulations of complex multicomponent diesel fuels in high temperature and pressure turbulent flows,” International Journal of Heat and Mass Transfer, 104, 2017, pp. 819-834.
16
S. Gao, J. Yan, M. Wang and C. F. Lee, “Modeling of Quasi-1D Multi-Component Fuel Droplet Vaporization using Discrete Approach with Experimental Validation,” SAE Technical Paper, 0148-7191, 2018.
17
S. Ray, V. Harsha and V. Raghavan, “Prediction of vapor-liquid equilibrium of ternary system at high pressures,” Archives of Thermodynamics, 40, 2019, pp. 137-149.
18
S. Ray, V. Raghavan and G. Gogos, “Two-phase transient simulations of evaporation characteristics of two-component liquid fuel droplets at high pressures,” International Journal of Multiphase Flow, 111, 2019, pp. 294-309.
19
A. Arabkhalaj, A. Azimi, H. Ghassemi and R. S. Markadeh, “A fully transient approach on evaporation of multi-component droplets,” Applied Thermal Engineering, 125, 2017, pp. 584-595.
20
G. S. Zhu, R. D. Reitz and S. K. Aggarwal, “Gas-phase unsteadiness and its influence on droplet vaporization in sub-and super-critical environments,” International Journal of Heat and Mass Transfer, 44, No. 16, 2001, pp. 3081-3093.
21
R. C. Reid, J. M. Prausnitz and B. E. Poling, The properties of gases and liquids, Fourth Edition, New York, McGraw Hill, 1987.
22
S. Sazhin, W. Abdelghaffar, E. Sazhina, S. Mikhalovsky, S. Meikle and C. Bai, “Radiative heating of semi-transparent diesel fuel droplets,” Journal of heat transfer, 126, No. 1, 2004, pp. 105-109.
23
B. Abramzon and S. Sazhin, “Droplet vaporization model in the presence of thermal radiation,” International Journal of Heat and Mass Transfer, 48, No. 9, 2005, pp. 1868-1873.
24
B. E. Poling, J. M. Prausnitz and J. P. O'connell, The properties of gases and liquids, New York, Mcgraw-hill, 2001.
25
M. Riazi, Characterization and properties of petroleum fractions. First Edition, ASTM international, West Conshohocken, PA, 2005.
26
C. L. Yaws, Handbook of thermodynamic diagrams: volume and enthalpy diagrams for major organic chemicals and hydrocarbons, Texas, Elsrvier,2, 1996.
27
B. I. Lee and M. G. Kesler, “A generalized thermodynamic correlation based on three‐parameter corresponding states,” AIChE Journal, 21, No. 3, 1975, pp. 510-527.
28
B. J. McBride, M. J. Zehe and S. Gordon, NASA Glenn coefficients for calculating thermodynamic properties of individual species, First Edition, Ohio, National Aeronutics and Space Administration, John H. Glenn Research Center at Lewis Field, 2002.
29
A. A. Asghar Azimi and H. Ghassemi, “Influences of Unsteadiness on the Multicomponent Fuel Droplets,” Modares Mechanical Engineering, 17, 2017, pp. 293-304.
30
S. Patankar, Numerical heat transfer and fluid flow, CRC press, New York, 2018.
31
H. Ghassemi, S. W. Baek and Q. S. Khan, “Experimental study on binary droplet evaporation at elevated pressures and temperatures,” Combustion science and technology, 178, No. 6, 2006, pp. 1031-1053.
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ORIGINAL_ARTICLE
پخش سوخت مایع در محفظه احتراق از طریق برخورد جت با موانع استوانه ای کوچک
همگن سازی یک مخلوط رقیق از سوخت و هوا باعث می شود دمای جبهه شعله کاهش پیدا کرده و بهطورهمزمان باعث کاهش تولید اکسیدهای نیتروژن و ذرات معلق می شود. کارهای تجربی نشان داده است که سطح بالایی از پراکندگی برای رسیدن به مخلوط همگن را می توان با برخورد جت دیزل بر روی یک سری از موانع استوانه ای، به عنوان ساختار نزدیک به محیط متخلخل، به دست آورد. سوخت تزریق شده با اولین مانع استوانه ای برخورد می کند و به دو جت کوچکتر تقسیم میشود. سپس، با برخورد با موانع بعدی جت چندتایی به وجود آمده که باعث پخش سوخت می شود. کارهای تجربی قبلی نشان داده اند که ساختار هندسی و قطر موانع از عوامل اصلی در شکل گیری چند جت و توزیع فضایی سوخته اند. در این مقاله، مدلهای دینامیک سیالات محاسباتی، که با دقت رفتار شکل گیری چند جت گذرا را پیش بینی می کنند، توسعه می یابد و پس از اعتبارسنجی ساختارهای جدیدی از موانع با افزایش فاصله بین آنها و یک ساختار بهبودیافته ارائه شده است. مدل سازی جدید نشان میدهد که این ساختارها، نسبت به ساختارهایی که قبلاً مورد بررسی قرار گرفتهاند، دارای ویژگیهای همگنسازی بهتر بوده و توزیع فضای در آنها کارآمدتر است.
https://www.jfnc.ir/article_118645_e0e12b0dd19593b68be01399b3085fe5.pdf
2020-09-22
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پاشش دیزل
تشکیل مخلوط
استوانههای کوچک
سعید
کاظمی سرشت
kazemi.saeed@sru.ac.ir
1
حرارت و سیالات، مکانیک، تربیت دبیر شهید رجایی،تهران، ایران
LEAD_AUTHOR
آرش
محمدی
amohamadi@sru.ac.ir
2
حرارت و سیالات، مکانیک، تربیت دبیر شهید رجایی، تهران، ایران
AUTHOR
M. Polasek and J. Macek, “Homogenization of Combustion in Cylinder of CI Engine using Porous Medium,” SAE Paper, 2003-01-1085, 2003.
1
M. Weclas, “Homogenization of liquid distribution in space by Diesel jet interaction with porous structures and small obstacles,” in Proceedings of the 22nd European Conference on Liquid Atomization and Spray Systems, Como, Italy, September 2008.
2
F. Durst and M. Weclas, “A New Concept of I.C Engine with Homogeneous Combustion in a Porous Medium,” Fifth International Symposium on Diagnostic and Modeling of Combustion in Internal Combustion Engines, Nagoya, 2001.
3
F. Durst and M. Weclas, “A new type of internal combustion engine based on the porous-medium combustion technique,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 215, No. 1, pp. 63-81, 2001.
4
M. Weclas, B. Ates and V. Vlachovic, “Basic aspects of interaction between a high velocity Diesel jet and a highly porous medium (PM),” 9th International Conference on Liquid Atomization and Spray Systems ILASS, Erlangen, Germany, 2003.
5
M.Weclas, “High velocity CR diesel jet impingement on to porous structure and its utilization for mixture homogenization in I.C. engines,” DITICE Workshop: Drop/wall interaction: Industrial applications, Experiments and Modeling, Bergamo, Italy, 19 May 2006.
6
M. XIE and Z. ZHAO, “Numerical investigation of the effects of fuel spray type on the interaction of fuel spray and hot porous medium,” Frontiers of Energy and Power Engineering in China, 2, No.1, 2008, pp. 59-65.
7
M. Weclas and R. Faltermeier, “Diesel Jet Impingement on Small Cylindrical Obstacles for Mixture Homogenization by Late Injection Strategy,” Int. J. Engine Res, 8, 2007, pp. 399-413.
8
M.Weclas, “Non-stationary high velocity jet impingement on small cylindrical obstacles,” Institut fur Fahrzeugtechnik (IFZN), D-90489 Nuremberg, Germany, 2007.
9
M. Weclas, “Potential of porous-media combustion technology as applied to internal combustion engines,” Journal of Thermodynamics, Volume 2010, Article ID 789262, 39 pages, doi:10.1155/2010/789262.
10
M. Weclas, J. Cypris, and T. Maksoud, “Diesel spray interaction with highly porous structures for supporting of liquid distribution in space and its vaporization,” AIP Conference Proceedings 4, American Institute of Physics, Potsdam, Germany 2012.
11
M. Weclas, J. Cypris and P. Weigand, “Diesel spray interaction with a thin porous ring and its contribution to mixture homogenization in IC engine,” 26th Annual Conf. on Liquid Atomization and Spray Systems, Bremen, Germany, 8–10 September, 2014.
12
M. Maher, et al., “CFD Modeling of Spray Formation in Diesel Engines,”Athens Journal of Technology and Engineering, 4, No. 4, pp. 271-294, 2017.
13
R. Falgenhauer, P. Rambacher, L. Schlier, J. Volkert, N. Travitzky, P. Greil and M. Weclas, “Electrically heated 3D-macro cellular SiC structures for ignition and combustion application,” Applied Thermal Engineering, 112, 2017, pp. 1557-1565.
14
R. Muggleton, M. Haghshenasfard and K. Hooman, “Numerical simulation of mixture homogenization through jet impingement on cylindrical obstacles,” Fluid Dynamics Research, 50, No. 4, 2018, pp. 045515.
15
C. Baumgarten, Mixture formation in internal combustion engines, Springer Science & Business Media, 2006.
16
H. Mohammadi and et al., “Numerical investigation on the hydrodynamics of the internal flow and spray behavior of diesel fuel in a conical nozzle orifice with the spiral rifling like guides,” Fuel, 196, 2017, pp. 419-430.
17
ORIGINAL_ARTICLE
بررسی آزمایشگاهی اثر سوخت (HHO_CNG) بر عملکرد موتور پایه بنزین سوز
در موتورهای پیستونی با افزایش دور موتور مدت زمان سیکل احتراق کاهش می یابد. با کاهش زمان سیکل احتراق موتور فرصت برای احتراق کامل سوخت کم می شود. درنتیجه، به منظور تکمیل احتراق سوخت در دورهای بالای موتور، شمع باید زودتر جرقه بزند. حال، با توجه به اینکه سرعت شعله گاز طبیعی نسبتبه بنزین کمتر است، این مشکل محسوس تر می شود. درنتیجه مقدار پیش انداختن زمان جرقه شمع موتور، درحالت گازسوز، نسبتبه حالتی که بنزین می سوزاند، باید بیشتر افزایش یابد. این کار منجربه افزایش کار منفی در مرحله تراکم میشود که سبب کاهش بازدهی چرخه می شود. محققان برای بهبود احتراق گاز طبیعی پیشنهاد اضافه کردن هیدروژن را داده اند(HCNG) . با اضافه کردن هیدروژن خواص شعله وری گاز طبیعی بهبود می یابد. در این پژوهش، با استفاده از هیدروراکتور، گاز هیدروژن و اکسیژن (HHO) به روش الکترولیز از آب تولید و مصرف می شود. گاز HHO تولیدشده به همراه گاز CNGبا هوای ورودی به موتور ترکیب می شود. سپس، تاثیر گاز HHO-CNGبر پارامترهای بازدهی، توان و آلودگی بررسی شده است. نتایج به دست آمده نشان می دهد که با اضافهشدن HHO بازده حرارتی افزایش می یابد. در این شرایط، میزان CO و UHC کاهش داشته است. این کاهش آلودگی و افزایش بازده به علت کاهش نیاز به آوانس جرقه شمع و احتراق کامل سوخت است.
https://www.jfnc.ir/article_118944_9c8c8d98cbc1e3fbb84e28c79e31c4e5.pdf
2020-09-22
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135
HHO
CNG
موتور
احتراق
آلودگی
صمد
جعفرمدار
s.jafarmadar@urmia.ac.ir
1
گروه آموزشی مکانیک، دانشکده فنی، دانشگاه ارومیه، ایران
LEAD_AUTHOR
پوریا
مجیدی
p.majidi@urmia.ac.ir
2
دانشجوی دکتری مکانیک گرایش تبدیل انرژی دانشگاه ارومیه
AUTHOR
M. Zhiani, J. Rezaei and S. Kamali, “Preparation and evaluation of hydrogen electrode based on nickel
1
nanoparticles on the graphene in water electrolysis,” Scientific Research Journal of Fuel and Combustion, 11, 3, 2018, pp. 19-28. (in Persian)
2
F. Ma and R. Kumar Mehra, “Study of Quasi‐Dimensional Combustion Model of Hydrogen‐Enriched Compressed Natural Gas (HCNG) Engines,” Sustainable Energy-Technological Issues, Applications and Case Studies, World's largest Science, Technology & Medicine Open Access book publisher, December 2016.
3
F. Yan, L. Xu and Y. Wang, “Application of hydrogen enriched natural gas in spark ignition IC engines: from fundamental fuel properties to engine performances and emissions,” Renewable and Sustainable Energy Reviews,82, Part 1, 2018, pp. 1457-1488.
4
M. R. Dahake, S. D. Patil and S. E. Patil, “Effect of Hydroxy Gas Addition on Performance and Emissions of Diesel Engine,” International Research Journal of Engineering and Technology (IRJET),3, Issue 1, 2016, pp. 756-760.
5
H. Turan, M. Kaan and K. Aydin, “Effect of using Hydroxy – CNG fuel mixtures in a non-modified diesel engine by substitution of diesel fuel,” International Journal of Hydrogen Energy, 41, No. 19, 2016, pp. 8354-8363.
6
S. A. Musmar and A. A. Al-Rousan,” Effect of HHO gas on combustion emissions in gasoline engines,” Fuel, 90, Issue 10, 2011, pp. 3066-3070.
7
A. Sonthalia, C. Rameshkumar, U. Sharma, A. Punganur and S. Abbas, “Combustion and performance characteristics of a small spark ignition engine fuelled with HCNG,” Journal of Engineering Science and Technology, 10, No. 4, 2015,pp. 404-419.
8
S. Orhan Akansu, N. Kahraman and B. Çeper, “Experimental study on a spark ignition engine fueled by methane–hydrogen mixtures,” International Journal of Hydrogen Energy, 32, 2007, pp. 4279-4284.
9
P. Yaom and S. Watechagit, “Relationship between the variations of hydrogen in HCNG fuel and the oxygen in exhausted gas,” KKU Engineering Journal, 42, No. 3, 2015, pp. 263-268.
10
Subaru/Robin, Model Eh36, Parts Catalog Website, http://www.subarupower-global.com, Accessed 2020.4.30.
11
M. Gupta, S. R. Bell and S. T. Tillman, “An Investigation of Lean Combustion in a Natural Gas-Fueled Spark Ignited Engine,” Journal of Energy Resource Technology, 118, 1996, pp. 145-165.
12
S. Orhan Akansua, Z. Dulger, N. Kahraman and T. Nejat Veziroglu, “Internal combustion engines fueled by natural gas hydrogen mixtures” International Journal of Hydrogen Energy, 29, 2004,pp. 1527-1539.
13
G. T. Chala, Abd R. Abd Aziz and F. Y. Hagos, “Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue,” Energies, 11, 2934, 2018, doi: 10.3390/en11112934.
14
Tamer Nabil, “Efficient Use of Oxy-hydrogen Gas (HHO) in Vehicle Engines,” International Information and Engineering Technology Assocation, 1, 2019, pp. 87-96.
15
S. Shingane, C. H. Dorababu, P. Santosh Kumar, P. L. N. Naidu, K. R. V. Subramanian And T. Nageswara Rao, “The electrolysis of water to generate hydrogen (hho) and a study of the effect of addition of hho to gasoline as an engine,” International Journal of Mechanical and Production Engineering Research and Development (IJMPERD), 8, Special Issue 8, 2018, pp. 181-186.
16
B. Sudarmanta, S. Darsopuspito and D. Sungkono, “Application of dry cell hho gas generatorwith pulse width modulation on sinjai spark ignition engine performance,” IJRET: International Journal of Research in Engineering and Technology, 5, Issue 2, 2016, pp. 105-112.
17
S. Pamford Kojo Essuman, A. Nyamful, V. Yao Agbodemegbe and S. Kofi Debrah, “Effect of hho gas asfuel additive on the exhaust emissions of internal combustion engine,” International Journal of Advanced Scientific Research and Development, 6, Issue 3, Version I, 2019, pp. 01–12.
18
Basori, “Experimental investigation on dry cell hho generator with catalyst variation for reducing the emissions,” Journal of Mechanical Engineering and Vocational Education (JoMEVE), 1, No. 1, 2018, pp. 105-112.
19
Sa’ed A. Musmar and Ammar A. Al-Rousan, “Effect of HHO gas on combustion emissions in gasoline engines,” Fuel, 90, No. 10, 2011, pp. 3066-3070.
20
J. B. Heywood, “Internal Combustion Engine Fundamentals,” Chapter 5, Tata McGraw-Hill Education, 2011.
21
H. H. Geok, T. I. Mohamad, S. Abdullah, Y. Ali and A. Shamsudeen, “Experimental Investigation of Performance and Emissions of a Sequential Port Injection Compressed Natural Gas Converted Engine,” European Journal of Scientific Research, 30, No. 2, 2009, pp.204-214.
22
M. A. Kalam and H. H. Masjuki, “An experimental investigation of high performance natural gas engine with direct injection,” Energy, 36, 2011,pp. 3563-3571.
23
R. Kenanoğlu, M. Kaan Baltacioğlu and E. Baltacioğlu, “Numerical Comparison of HHO and HHOCNG Fuel Performance Analysis with Pilot Diesel Injection,” Advanced Engineering Forum, 18, 2016, pp. 58-65.
24
R. Ebrahimi and S. Besharati, “An Experimental Comparison of Spark Ignition Engine with Gasoline and Natural Gas Fuels,” Scientific Research Journal of Fuel and Combustion, 3, No. 1, 2010, pp. 75-85. (in Persian)
25
D. E. Winterbone, A. Turan, “Advanced Thermodynamics for Engineers,” Butterworth-Heinemann, edition 2, 2015.
26
P. Polverino, F. D’Aniello, I. Arsie and C. Pianese, “Investigation of the energy requirements for the on-board generation of oxy-hydrogen on vehicles,” Energy Procedia, 148, 2018, pp. 962-96.
27
S. Lee, C. Kim, Y. Choi, G. Lim and Ch. Park, “Emissions and fuel consumption characteristics of an HCNG-fueled heavy-duty engine at idle,” international journal of hydrogen energy, 39, 2014, pp. 8078-8086.
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