密闭管道内非连续分布甲烷/空气爆炸特性
Explosion characteristics of discontinuous distribution methane/air in closed pipe
郑凯 1周朋1
作者信息
- 1. 常州大学 安全科学与工程学院,江苏 常州 213164
- 折叠
摘要
在长度 900 mm、截面为 100 mm×100 mm的矩形密闭管道内开展预混气体非连续分布对甲烷/空气爆炸影响的试验研究.通过分段通入甲烷体积分数为9.5%的预混气体,形成甲烷/空气-空气和甲烷/空气-空气-甲烷/空气两种非连续分布模式.研究发现,随着空气区域缩短,火焰传播距离、火焰尖端速度和爆炸超压均增大.特别是在甲烷/空气-空气-甲烷/空气分布中,当中间空气区域小于500 mm时,火焰会穿越并引发二次爆炸,且其超压随空气区域减小而增加.研究结果可为天然气爆炸事故防控提供理论支持.
Abstract
In this paper,the effect of discontinuous distribution of premixed gas on methane/air explosion was studied experimen-tally in a rectangular closed pipe with a length of 900 mm and a section of 100 mm×100 mm.Segmentally introduce methane/air with a volume fraction of 9.5%into the pipe to form two types of discontinuous distribution premixed gases:methane/air-air and methane/air-air-methane/air.The results show that the flame propagation distance,flame tip speed and explosion overpressure increase with the shortening of the air area.Especially in the form of methane/air-air-methane/air distribution,when the intermedi-ate air area is less than 500 mm,the flame will pass through and cause a secondary explosion,and its overpressure will increase with the decrease of the air area.The research results can provide theoretical support for the prevention and control of natural gas ex-plosion accidents.
关键词
非连续分布/甲烷/空气/火焰行为/火焰尖端速度/爆炸超压Key words
discontinuous distribution/methane/air/flame behav-ior/flame tip speed/explosive overpressure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据