稀薄燃气多孔介质燃烧二维火焰数值模拟(英文)  

Two-dimensional combustion flame profiles in porous media with ultra low-calorific gases

作　　者：王关晴[1] 罗丹[1] 丁宁[1] 黄雪峰[1] 徐江荣[1] 

机构地区：[1]杭州电子科技大学理学院能源研究所,浙江杭州310018

出　　处：《化工学报》2012年第6期1893-1901,共9页CIESC Journal

基　　金：supported by the Natural Science Foundation of Zhejiang Province(Y1090313);the National Natural Science Foundation of China(51006029)~~

摘　　要：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.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.

关 键 词：泡沫陶瓷 多孔介质燃烧 火焰峰面 倾斜 

分 类 号：TK124[动力工程及工程热物理—工程热物理]