关键词: 泡沫陶瓷, 多孔介质燃烧, 火焰峰面, 倾斜

Abstract: Twodimensional combustion flame front and temperature profiles of ultra lowcalorific gases in porous combustor are investigated numericallyThe characteristics of the flame front, high temperature profiles under certain operating parameters, and the flame propagation process are examinedThe effects of operating parameters, such as equivalence ratio, superficial velocity of gas and the wall heat loss, on the flame front and hightemperature zone are analyzedThe results show that the shape of the flame front is gradually changed in the propagation process of the flameAccordingly, this process results in the variation of the high temperature zoneAs the equivalence ratio increases, the inclination of the flame front near the wall decreases gradually, while the combustion flame propagates upstream graduallyThe shape of the flame front gradually changes from the trapezoid to the straightline distribution with downward inclination on both sidesThe effect of gas velocity on the shape and position of flame front is contrary to that of the equivalence ratioOn the other hand, the wallheat loss can lead to the inclination of the flame front near the combustor wall, while the effect on the position of flame is less.

Key words: foam ceramics, porous medium combustion, flame front, inclination