摘要
为探究多孔材料空间位置对置障管道中甲烷/空气爆炸过程及火焰加速效应的影响,采用高速摄像机和冲击波测试仪监测爆炸过程特性参数变化,分析多孔材料安装于距点火端40、50、60、75cm处时对火焰涡激励动力的影响和超压瞬态变化。结果表明:多孔材料位于50cm处,火焰涡激励效应最显著,火焰加速传播,最大速度可达72.80m/s;多孔材料位于管道前半部分时,多孔网状障碍物对压力波的促进作用起主导,且50cm处的促进效果优于40cm处;位于管道后半部分时,多孔网状材料阻挡、反射和衰减压力波作用起主导,且75cm处的衰减效果优于60cm处。恰当的多孔材料位置在实际燃爆场景中十分重要,可避免阻火材料安装不当带来更大爆炸危害发生。
In order to explore the influence of the spatial position of the porous material on the methane/air explosion process and flame acceleration effect in the barrier pipe, a high-speed camera and a shock wave tester were used to monitor the change of characteristic parameters in the explosion process, and analyze the influence of the porous material which was installed at 40, 50, 60 and 75 cm from the ignition end on the flame vortex excitation power and the overpressure transient change. The results show that when the porous material is located at 50 cm, the flame vortex excitation effect is the most significant, and the flame propagation is accelerated and the maximum velocity can reach 72.80 m/s;that when the porous material is located in the front half of the pipe, the porous reticular barrier plays a leading role in promoting the pressure wave, and the promotion effect at 50 cm is better than that at 40 cm;that when the porous material is located in the rear half of the pipe, the porous reticular material plays a leading role in blocking, reflecting and attenuating the pressure wave, and the attenuation effect at 75 cm is better than that at 60 cm. The proper location of the porous material is very important in the actual combustion and explosion scene, so as to avoid more explosion hazards caused by the improper installation of fire-retardant materials.
作者
龙凤英
李泽欢
黄俊
俞树威
段玉龙
LONG Fengying;LI Zehuan;HUANG Jun;YU Shuwei;DUAN Yulong(School of Safety Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Chongqing Key Laboratory of Oil and Gas Work Safety and Risk Control,Chongqing 401331,China)
出处
《安全》
2022年第9期16-23,共8页
Safety & Security
基金
河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地开放基金(WS2021A04)
重庆科技学院科技创新研究生项目(YKJCX2120703)。
关键词
多孔材料
空间位置
甲烷/空气爆炸
实验
porous material
spatial position
methane/air explosion
experiment
