化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2012年
6期
1893-1901
,共9页
王关晴%罗丹%丁宁%黄雪峰%徐江荣
王關晴%囉丹%丁寧%黃雪峰%徐江榮
왕관청%라단%정저%황설봉%서강영
泡沫陶瓷%多孔介质燃烧%火焰峰面%倾斜
泡沫陶瓷%多孔介質燃燒%火燄峰麵%傾斜
포말도자%다공개질연소%화염봉면%경사
foam ceramics%porous medium combustion%flame front%inclination
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 isgradually 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.