泄爆诱导二次爆炸的实验研究  

Experimental investigations of external second-explosion induced by vented explosion

作　　者：叶经方[1] 姜孝海[1] 贾正望[1] 董刚[1] 范宝春[1] 

机构地区：[1]南京理工大学动力工程学院,江苏南京210094

出　　处：《爆炸与冲击》2004年第4期356-362,共7页Explosion and Shock Waves

基　　金：国家重点基础研究专项基金项目(2001CB409600)

摘　　要：在不同泄爆压力、不同泄爆面积和不同当量比的甲烷/空气预混气的实验条件下,采用容积为0.00814m3带导管的柱形泄爆容器和底端中心点火方式,进行了一系列泄爆实验。实验获得了内外流场测点的压力历史曲线。结果表明泄爆后外流场出现典型的破膜激波和二次爆炸波的双峰变化特征,前者不断下降,其强度随泄爆压力的增大而增大,而后者经历了上升和下降过程,强度随泄爆压力、泄爆面积和甲烷/空气当量比的增大而增大。A series of vented explosion experiments in 0.00814 m3 cylindrical vented vessel with central bottom ignition were performed. The effects of different failure pressure, different vent area and different stoichiometric ratio of methane/air mixture on venting were investigated. The results show that there exists the typical rupture shock wave and the second explosion wave in the external flow field during venting. The value of the rupture shock wave declined all the time, and the value of second explosion wave rose to the maximum and then declined. The peak value of the second explosion rose with the increase of failure pressure, vent area and stoichiometric ratio of methane/air mixture respectively.

关 键 词：爆炸力学 二次爆炸 实验研究 甲烷/空气预混气 泄爆 

分 类 号：O381[理学—流体力学] X932[理学—力学]