Experimental Study on Optimal Start-up Load of Porous Media Burners
Using a fully premixed porous media burner,the maximum start-up load,time to enter flame-less combustion and maximum stable load of the porous media burner were investigated under the influence of factors such as porous media thickness,material and pore size.The start-up load affects the operating status of the burner,and an appropriate start-up load can a-chieve flameless combustion of porous media burners.For the burners studied,the maximum start-up load into flameless combustion does not vary significantly,ran-ging from 7 kW to 8 kW,under different porous media thicknesses,pore sizes,material types and arrangement methods.The time for the burner to enter flameless combustion varies significantly under different influen-cing factors.Properly reducing the thickness of porous media,reducing the pore size of upstream porous media,and using porous media with low radiation coef-ficients all shorten the time to enter flameless combus-tion.Under different influencing factors,the maximum stable load that the burner can maintain flameless com-bustion varies significantly.The arrangement methods of upstream silicon carbide and downstream alumina porous media,that is,using downstream materials with lower radiation coefficients,can achieve a larger maxi-mum stable load.
porous media burnerflameless combustionstart-up loadSiC porous mediaAl2O3 por-ous media
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