Cyclic Flow Reversal Combustion of Liquid Fuels in a Porous Burner

This study introduces a novel concept of superadiabatic combustion for liquid fuels through the implementation of cyclic flow reversal combustion (CFRC) technology within porous burners. Transient temperature profiles were experimentally investigated to characterize the thermal behavior of the system. The optimal half period for CFRC operation was determined, and the emissions of carbon monoxide (CO) and nitrogen oxides (NOx) were measured and systematically compared to those obtained using the one-way flow combustion (OWFC) technique. The findings of this study indicate that an operational half period in the range of 10–60 s is optimal for the CFRC system, yielding a thermal efficiency of approximately 45% and demonstrating its potential effectiveness. Moreover, the CFRC system exhibits lower emission levels than the OWFC approach.