多孔纤维质颗粒阴燃特性及烟气粒度  

Porous Medium Smolder Property and Smoke Particles Sizing

作　　者：黄群星[1] 马增益[1] 严建华[1] 王琼[1] 池涌[1] 王飞[1] 岑可法[1] 

机构地区：[1]浙江大学热能工程研究所能源清洁利用与环境工程教育部重点实验室,杭州310027

出　　处：《燃烧科学与技术》2004年第6期563-566,共4页Journal of Combustion Science and Technology

基　　金：国家重点基础研究资助项目(2001CB409600);国家自然科学基金资助项目(N50106015).

摘　　要：针对多孔介质阴燃过程发烟的显著特征,研究了同向和逆向阴燃的传播特性以及烟气中颗粒的粒度分布特性.粒度谱的测量基于消光法,采用光电光谱仪测量消光系数,遗传算法被用做重建算法.实验结果表明,相同的氧化剂浓度下,逆向阴燃比同向阴燃稳定,阴燃传播过程中烟气浓度高,阴燃传播速度快,平均温度水平高.从烟气颗粒的粒度谱可以看出逆向阴燃的颗粒浓度高,平均粒度大,而同向阴燃烟气中气溶胶含量比逆向阴燃高.Propagation characteristic and smoke particles size distribution of forward and opposed smolder were studied. Smoke particles extinction coefficient was recorded by photo electricity spectral instrument on the basis of light extinction algorithm. Evolutionary program was used to reconstruct particles size distribution representation. The experiments results show that under the same smolder conditions, opposed smolder propagates more stable and faster with higher average temperature level and smoke production rate. The soot particles concentration and average size of opposed smolder are all greater than those of forward smolder. But the proportion of aerosol particles in the smoke of forward smolder is much larger than that of opposed one.

关 键 词：阴燃 粒度谱 消光法 遗传算法 

分 类 号：TK311[动力工程及工程热物理—热能工程]