含弱约束结构受限空间油气爆炸外部火焰特性  

External Flame Characteristics of Gasoline-air Mixture Explosion in Confined Space with Weakly Constrained Structure

作　　者：王世茂[1] 杜扬[1] 李阳超[1] 袁广强 

机构地区：[1]后勤工程学院军事供油工程系,重庆401311

出　　处：《后勤工程学院学报》2016年第5期39-43,共5页Journal of Logistical Engineering University

基　　金：国家自然科学基金项目(51276195)

摘　　要：构建了含弱约束结构受限空间油气爆炸实验系统,基于模拟实验对外部火焰特性进行了研究。结果表明:火焰形态变化主要受Rayleigh-Taylor不稳定、Helmholtz不稳定、斜压效应、热流推举作用的影响;火焰发展模式受初始油气体积分数影响,在低和中油气体积分数条件下,火焰发展模式为强爆燃;在高油气体积分数条件下,火焰发展模式为泄流后的定压燃烧;初始油气体积分数为1.79%时,火焰发展范围达到最大,高度为0.8 m,直径为0.6 m。An experimental system of gasoline-air mixture explosion with weakly confined structures was established to stu-dythe characteristics of flame by means of simulation experiment. Results show that the flame change of formis mainly influenced byRayleigh-Taylor instability, Helmholtz instability, baroclinicity, and elect of heat flow. The flame model is subject to the influence ofinitial gasoline-air mixture volume fraction, while under low and medium volume fraction, it is strong detonation; and under high vol-ume fraction, the flame model is neutral combustion. The flame development range reaches the maximumwhen the initial volumefraction is 1.79%, and the limit height is 0.8 m, the limit diameter is 0.6 m.

关 键 词：油气爆炸 受限空间 弱约束结构 火焰特性 

分 类 号：X932[环境科学与工程—安全科学]