| 半密闭空间油气爆炸初期火焰特性研究 |
| |
| 引用本文： | 欧益宏,李润,袁广强,李国庆,王世茂.半密闭空间油气爆炸初期火焰特性研究[J].中国安全生产科学技术,2018,14(2):157-162. |
| |
| 作者姓名： | 欧益宏 李润 袁广强 李国庆 王世茂 |
| |
| 作者单位： | （陆军勤务学院 油料系，重庆 401311） |
| |
| 摘 要： | 为了研究半密闭空间内部油气着火爆炸初期火焰特性，进行了不同油气体积分数下的油气着火爆炸实验，通过高速摄影等技术手段对爆炸过程中火焰形态进行了捕捉，分析了不同油气体积分数下爆炸初期火焰着火模式、火焰形态、传播过程和火焰浮力稳定性的变化规律。结果表明:油气体积分数为决定容器内部着火模式的关键因素，随着油气体积分数的逐渐增大，着火模式呈现出燃烧-爆炸-爆燃后持续燃烧的转变；爆炸下的火焰具有明显的分区现象，而其他的着火模式则没有；随着油气体积分数的增加，越靠近化学当量比，纵向和横向火焰阵面速度越大；油气体积分数小于等于1.1%或大于等于2.6%时，火焰稳定性受浮力影响显著。
|
| 关 键 词： | 半密闭空间 油气 火焰特性 浮力 |
Study on initial flame characteristics of gasoline-air mixtures explosion in semi-confined space |
| |
| OU Yihong,LI Run,YUAN Guangqiang,LI Guoqing,WANG Shimao.Study on initial flame characteristics of gasoline-air mixtures explosion in semi-confined space[J].Journal of Safety Science and Technology,2018,14(2):157-162. |
| |
| Authors: | OU Yihong LI Run YUAN Guangqiang LI Guoqing WANG Shimao |
| |
| Affiliation: | (Department of Oil, Army Logistics University of PLA, Chongqing 401311, China) |
| |
| Abstract: | In order to investigate the flame characteristics in the initial stage of gasoline-air mixtures explosion in the semi-confined space, the experiments of gasoline-air ignition and explosion under different gasoline-air volume fractions were carried out. The flame morphology during the explosion process were captured by the high-speed photography and other technical methods, and the change laws of flame ignition modes, flame morphology, propagation process, stability of flame buoyancy in the initial stage of explosion under different gasoline-air volume fractions were analyzed. The results showed that the gasoline-air volume fraction was the key factor determining the internal ignition mode in the vessel. With the gradual increase of the gasoline-air volume fraction, the ignition mode presented the transition to the continuous combustion after the combustion-explosion-deflagration. The flame under the explosion had an obvious partition phenomenon, while the other modes of ignition had not. With the increase of the gasoline-air volume fraction, the closer to the stoichiometric ratio, the larger the front speeds of the longitudinal and horizontal flame. The flame stability was significantly affected by the buoyancy when the gasoline-air volume fraction was less than or equal to 1.1% or larger than or equal to 2.6%. |
| |
| Keywords: | semi-confined space gasoline-air mixtures flame characteristics buoyancy |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国安全生产科学技术》浏览原始摘要信息 |
|
点击此处可从《中国安全生产科学技术》下载全文 |
|
