Numerical Simulation Study on Combustion and Emission Characteristics of Cylindrical Porous Media Burners

Abstract

Abstract. Porous media burners offer significant advantages due to their high efficiency and low emissions. Nevertheless, a substantial challenge in the field of porous media burner research pertains to the precise control of crucial operating parameters, with the objective of further reducing pollutant emissions while maintaining combustion stability. The establishment of a numerical model of a cylindrical porous media burner enabled the simulation of the premixed combustion process, with a focus on the analysis of the effects of equivalence ratio, inlet velocity, and temperature on combustion characteristics and pollutant emissions. The findings of the study demonstrate that augmenting the equivalence ratio and inlet velocity results in elevated flame temperature and heightened nitrogen oxide and carbon monoxide emissions. Conversely, an increase in the inlet temperature has been shown to enhance both flame and outlet temperatures while concomitantly reducing pollutant emissions. The system reveals the variation patterns of combustion stability and emission characteristics across various operating conditions, with the findings offering theoretical support for optimizing burner design and operational control. This finding is of considerable significance for the achievement of highly efficient, low-pollution combustion.