Non-sprayed cyclic flow reversal combustion of liquid fuel in a porous burner

This study investigates the cyclic flow reversal combustion (CFRC) of liquid kerosene in a porous burner, focusing on how the equivalence ratio and combustion load affect combustion performance and emissions. The effect of porous bed length on maintaining a stable combustion zone was also examined. Experiments show that the highest thermal efficiency of 45% was achieved at an equivalence ratio of 0.54 and a combustion load of 12 kW. A porous bed length of 150 mm provided the widest stable operating range. In addition, the CFRC maintained low NOₓ emissions even at higher combustion intensity. These results demonstrate that CFRC can provide stable, efficient liquid-fuel combustion with lower environmental impact, offering practical guidance for designing and optimizing porous burner systems under different operating conditions.