Numerical Investigation of Producer Gas Combustion Under Different Mixing Patterns of Air-Fuel Injections in a Cyclone Combustor

This paper presents numerical modeling to determine characteristics of producer gas combustion in a cyclone combustor under different air-fuel mixing patterns. The burner was configured by varying in premixed, non-premixed, and co-flow modes. The combustion process was operated at a thermal power input of about 50 kW with respect to ambient conditions of air-fuel injections. The numerical modeling was carried out using the eddy dissipation concept combustion model integrated with a 17 species skeletal (SK17) reaction mechanism. The numerical result was validated with the existing experimental data before implementing the studied cases. Swirling flow field and combustion characteristics were compared for all three cases. It could be concluded that the premixed combustion mode was a better option in comparison with two other cases, considering that it gives higher swirling flow field characteristics, leading to a good result in combustion efficiency and lower both CO and NO emissions.