过滤燃烧火焰锋面不稳定性的实验研究  

Experimental Studies on the Flame Front Instability Characteristics in Filtration Combustion

作　　者：薛治家[1] 于庆波[1] 刘慧[1] 史俊瑞[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819 [2]沈阳工程学院能源与动力工程学院,辽宁沈阳110136

出　　处：《东北大学学报（自然科学版）》2013年第9期1273-1276,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51076109;51176026);中央高校基本科研业务费专项资金资助项目(N110302004);辽宁省高等学校优秀人才支持计划项目(LJQ2011135;LR201029)

摘　　要：实验研究甲烷/空气预混气体在多孔介质燃烧器中燃烧的火焰锋面不稳定特性.结果表明,给定一个初始非均匀预热区域,在当量比为0.41,流速为0.42 m/s时,在6 mm的小球填充床内,火焰锋面由较为规则的对称火焰逐渐演变为倾斜火焰,并最终分裂为上下两个区域.在布置填充床的同时,对填充床进行夯实,降低孔隙率分布不均匀性.在孔隙率均匀的填充床内,初始的非均匀预热区域,使得火焰的传播极其不稳定,最终导致熄火;即使给定初始均匀的预热区域,火焰锋面依然具有一定的不对称性.填充床的结构不均性是过滤燃烧火焰锋面倾斜的主要原因,而初始的不均匀因素将加剧火焰传播的不稳定性.The flame front instability characteristics of the combustion of the methane / air premixed gas in the porous media burner w ere investigated.The experiment results show ed that in a particle bed w ith the ball diameter of 6 mm,the flame front changes from the regular symmetrical flame to the inclined flame gradually and split into tw o areas finally in a given initial uneven preheated zone w hen the equivalent ratio is 0.41,and the flow velocity is 0.42 m / s.When the particle bed w as arranged,the balls w ere tamped dow n to decrease the uneven distribution of porosity.The initially uneven preheated areas in the even distribution of the porosity caused the flame propagated unstably and misfired in the end.Even though the given initial preheated area w as even,the flame front w as still somew hat unsymmetrical.The results show ed that the uneven structure of the particle bed is the main reason that the flame front inclines in the filtration combustion and the initial uneven factor accelerates the instability of the flame propagation.

关 键 词：多孔介质 过滤燃烧 火焰传播 不稳定 实验研究 

分 类 号：TN914.3[电子电信—通信与信息系统]