Fuel and Combustion

Fuel and Combustion

Influence of Heat Loss on the Burning Velocity of Flame Propagation through Organic Dust Particles

Authors
Mehdi Bidabadi
Fatemeh Ebrahiminasab
School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Abstract
This paper presents the influence of heat-loss on the structure of flame during propagation through two-phase mixture including micro-organic particles and air in the framework of thermal-diffusive model with non-unity Lewis number and Damköhler number (ratio of chemical reaction rate to vaporization rate). Then, burning velocity as a combustion parametere is analytically characterized with heat-loss impact. The model predictions are validated with both published experimental data and previous theoretical models, and reasonable agreement is achieved. The obtained results demonstrate that heat-loss plays a significant role in the reduction of the burning velocity.
Keywords
Heat loss effect, Organic dust particles, Damköhler numbe
.   O. S. Han, M. Yashima, T. Matsuda, H. Matsui, A. Miyake and T. Ogawa, “Behaviour of Flame Propagating through
Lycopodium Dust Clouds in a Vertical Duct,” Journal of Loss Prevention in the Process Industries, 13, 2000, pp. 449-
457.
2.   M.  Bidabadi  and  A.  Rahbari,  “Modeling  Combustion  of  Lycopodium  Particles  by  Considering  the  Temperature
Difference Between the Gas and the Particles,” Combustion Eexplosion and Shock Waves, 45, 2009, pp. 49-57.
3.   C. Proust, “A Few Fundamental Aspects about Ignition and Flame Propagation in Dust Clouds,” Journal of Loss
Prevention in the Process Industries, 19, 2006, pp. 104-120.
4.   C. Proust, “Flame Propagation and Combustion in Some Dust-Air Mixtures,” Journal of Loss Prevention in the Process
Industries, 19, 2006, pp. 89-100.
5.   R. K. Eckhoff, “Differences and Similarities of Gas and Dust Explosions: A Critical Evaluation of the European ‘ATEX’ Directives in Relation to Dusts,” Journal of Loss Prevention in the Process Industries, 19, 2006, pp. 553-560.
6.    M. Bidabadi and A. Rahbari, “Novel Analytical Model for Predicting the Combustion Characteristics of Premixed Flame
Propagation in Lycopodium Dust Particles,” J. Mech. Sci. Technol., 23, 2009, pp. 2417-2423.
7.   M. Bidabadi, A. Haghiri and A. Rahbari, “Mathematical Modeling of Velocity and Number Density Profiles of Particles
Across the Flame Propagation through a Micro-Iron Dust Cloud,” Journal of Hazardous Materials, 176, 2010, pp. 146-
153.
8.   E. Barrios, J. Prince and C. Trevino, “The Role of Duct Thickness on the Quenching Process of Premixed Flame
Propagation,” Combustion Theory and Modelling, 12, 2008, pp. 115-133.
9.   F. Williams, Combustion Theory, 2th Edn, Addison-Wesley, Redwood City, CA, 1985.
10.  K. Seshadri, A. L. Berlad and V. Tangirala, “The Structure of Premixed Particle-Cloud Flames,” Combustion and Flame,
89, 1992, pp. 333-342.
11. J. Daou and M. Matalon, “Influence of Conductive Heat-Losses on the Propagation of Premixed Flames in Channels,”
Combustion and Flame, 128, 2002, pp. 321-339.
12. A. Haghiri and M. Bidabadi, “Modeling of Laminar Flame Propagation through Organic Dust Cloud with Thermal
Radiation Effect,” International Journal of Thermal Sciences, 49, 2010, pp. 1446-1456.