Abstract
Abstract A small-scale (6.25 kW) reverse flow combustor with different fillings of porous media is explored to examine the effect on combustion behaviour, lean operational limit, and NOx, CO emissions. Premixed mixture of reactants is supplied to the combustor. Silicon carbide foam is used as the porous media. The investigation parameters include pore density of the porous media, reactant mixture injection diameter, and the volume occupied by porous media in the combustor. Combustor without porous media is also included in the study for comparison. The combustor is operated at high thermal intensity of 39 MW/m3-atm. Combustion is stabilized in the porous media as observed from its glow. Similar NOx and lower CO emission levels were obtained for the case with porous media. The results highlight the effectiveness of ceramic porous media in achieving stable combustion and low pollutant emissions at high thermal intensity applicable to gas turbine engines.
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