摘要
为研究不同泄爆条件下管道中火焰传播规律,本文运用聚乙烯薄膜材料密封2000mm长圆型有机玻璃管的一个端口开展泄爆实验,结果表明:在弱封闭端的条件下泄爆压力波形无法形成二次振荡,随着气体浓度的增加,泄爆负压振荡的时间相对浓度梯度存在延迟,当气体浓度为9.5%时,爆炸负压曲线出现最大值,当气体浓度为8%时,爆炸负压曲线出现最小值;在负压振荡时间段内,9.5%气体浓度的火焰传播速度变化最明显。
In order to study the law of the flame propagation in pipelines under different venting explosion conditions,in this paper,a port of 2000 mm long round plexiglass pipe was sealed with polyethylene film material to carry out venting explosion experiment.The results showed that the venting explosion pressure waveform can not form the second oscillation under the condition of the weak closed end,and with the increase of gas concentration,the time of the negative pressure oscillation of the venting explosion is delayed relative to the concentration gradient;that the negative pressure curve of the explosion appears the maximum value when the gas concentration is 9.5%,and the negative pressure curve of the explosion appears the minimum value when the gas concentration is 8%;and that the flame propagation velocity changes most obviously in the period of negative pressure oscillation when the gas concentration is 9.5%.
作者
黄勇
奚功晨
杨健
许宁
郝永梅
HUANG Yong;XI Gongchen;YANG Jian;XU Ning;HAO Yongmei(School of Environmental and Safety Engineering,Changzhou University,Changzhou Jiangsu 213000,China;Changzhou Ganghua Gas Co.,Ltd.,Changzhou Jiangsu 213161,China)
出处
《安全》
2022年第6期62-68,共7页
Safety & Security
关键词
甲烷
泄爆
狭长空间
火焰传播
负压振荡
methane
venting explosion
narrow space
flame propagation
negative pressure oscillation
