受限空间内局部油气爆燃超压与火焰传播特性  

Characteristics of Partial Gasoline-air Mixture Deflagration's Overpressure and Flame Propagation in Confined Space

作　　者：杜扬[1] 李阳超[1] 齐圣 王世茂[1] 

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33-38,共6页Journal of Logistical Engineering University

基　　金：国家自然科学基金项目(51276195)

摘　　要：对不同体积分数油气爆燃超压特性进行研究,发现爆燃超压-时间变化规律可归纳为3种形式;对火焰传播过程进行可视化研究,发现传播过程可分为5个阶段,且出现了tulip火焰;对火焰行为进行研究,得出爆燃升压速率振荡是由火焰与压力波相互作用引起的;对油气爆燃的超压峰值、爆燃时间、平均升压速率和爆燃孕育期进行研究,得到实验工况下由于局部积聚油气爆燃后,未燃气体得到氧气补充发生化学反应,导致最大爆燃超压峰值出现在当量比1.2处,而爆燃时间、爆燃孕育期的最小值和平均升压速率的最大值出现在化学当量比附近。Study on characteristics of gasoline-air mixture deflagration＇s overpressure under different volume fraction foundthat change rule of the overpressure-time can be divided into three types; through the visible studies on flame propagation process,the research found that the flame propagation process can be divided into five stages and tulip flame formed in this process. The os-cillation of the overpressure rise rate triggered by the interaction between flame and shock wave is gained through the investigationon the flame behavior. The research of peak overpressure, explosion time, average rate of pressure rise and the pregnant time of def-lagration found that the maximum overpressure peak is attained in the equivalence ratio 1.2, as a result of the unburnt gas is sup-plied with the oxygen of air; while the minimum values of deflagration time and pregnant period of deflagration whereas the maxi-mum value of average pressure rise rate are attained near the stoichiometric ratio.

关 键 词：油气 tulip火焰 超压 爆燃时间 爆燃孕育期 

分 类 号：X392[环境科学与工程—环境工程]