Investigating the effect of presence of porous media in the micro combustion chamber on radiation efficiency

In the present numerical study, 2D effect of presence of porous media on radiative efficiency in micro combustion chamber is investigated with taking account of conservative equations of momentum, energy and species. The effect of equivalence ratio of mixture and thermal conductivity of combustor wall as key parameters on radiative efficiency are also studied.. Based on simulation results, using of porous media in combustion chamber causes to increase of mean wall temperature and consequently radiation efficiency of micro combustor will increased . moving flame front toward downstream and reduction of maximum flow temperature is as result of applying porous media as well. Furthermore, maximum radiation efficiency is occurred in lean condition of fuel-air mixture. wall thermal conductivities is also perused on radiative efficiency . It is observed that there is an optimum value for conduction heat transfer coefficient of combustor walls, and the combustor material play an important role on radiative efficiency.