Fuel and Combustion

Fuel and Combustion

3D simulation and study of biogas combustion in C30 microturbine annular combustion chamber

Document Type : Original Article

Authors
Aref Sohrabi
seyyed mehdi mirsajedi
Shahid Beheshti University - Faculty of New Technologies and Aerospace Engineering
10.22034/jfnc.2024.456905.1392
Abstract
In this study, the combustion performance of C30 microturbine combustion chamber with biogas fuel with different mass fractions of CO2 has been analyzed and investigated. By assuming the periodic geometry and the two-stage reaction of fuel and oxide, the computational cost was reduced. To simulate the flow inside the chamber, three-dimensional Navier-Stokes equations and the k-ε turbulence model have been used to model the effects of turbulence. The flow inside the combustion chamber with different fuel components was analyzed with the EDDY DISSIPATION combustion model. To validate the solution and compare the results with the fabricated sample, pure CH4 was used as fuel. In this study, it was found that in the case of a constant mass flow rate of the consumed fuel, increasing the share of CO2 in the fuel with different mass fractions, due to the decrease in the calorific value created, caused a decrease in the production temperature, and it was also found that the use of biogas as a premix caused a decrease The amount of NOx becomes desirable. According to the obtained results, it is suggested that the amount of CO2 in the fuel is at most 10%, because the temperature has decreased by only 38 Kelvin and the amount of NOx in the output is 1.4 ppm.
Keywords
Microturbine
combustion chamber
biogas
premixed combustion
pollutant

Subjects

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