摘要
为研究多分支复杂巷道网络内爆炸冲击波传播规律和火焰传播机理,通过搭建由并联分支和角联分支共同组成的多分支复杂管道实验系统,研究瓦斯爆炸的超压峰值、火焰传播时间及光信号等变化规律。结果表明:在管网内瓦斯被点燃后,冲击波破膜时压力到达峰值,随后逐渐降低,体积分数为9.5%的瓦斯超压峰值最大为1.083 MPa;并联分支内,随着传播距离增加,超压呈降低的趋势。在角联分支内,正向冲击波和逆向冲击波在管网内反复叠加与对冲,使得角联分支中间部分管道超压峰值高于其余测点峰值,角联管道出现2次超压峰值,压强在此处出现了多次衰减与叠加,最大值为0.769 MPa;火焰阵面传播方向受压强影响,从高压区域往低压区域传播,管网角联分支内火焰微弱,且火焰主要沿着并联分支传播,最大传播速度为312.85 m/s;湍流增强火焰持续时间及火焰光信号。研究结果将为预防瓦斯爆炸、煤矿巷道设计提供参考。
In order to study the blast shock wave propagation law and flame propagation mechanism in the multi-branch complex roadway network,this paper builds a multi-branch complex pipeline experiment system to study the change laws of gas explosion overpressure peak,flame propagation time and light signal.The results show that after the gas is ignited in the pipe network,the pressure reaches the peak when the shock wave breaks the film,and then gradually decreases,and the peak gas overpressure at 9.5%concentration is 1.083 MPa;in the parallel branch,the overpressure decreases with the propagation distance.In the branch,forward shock waves and reverse shock waves are repeatedly superimposed and offset in the pipe network,so that the overpressure of the middle part of the branch is higher than two overpressure peaks in the pipe,and the maximum value is 0.769 MPa;the propagation direction of the flame surface is affected by the pressure and spreads from the high pressure area to the low pressure area,the flame in the network branch is weak,and the flame is mainly propagated along the parallel branch,the maximum propagation speed is 312.85m/s;the turbulent enhanced flame duration and flame light signal.The research results will provide a reference for the prevention of gas explosion and the design of coal mine roadway.
作者
李滋然
牛宜辉
江林桂
龚雨科
LI Zi-ran;NIU Yi-hui;JIANG Lin-gui;GONG Yu-ke(College of Safety Engineering,Chongqing University of Science&Technology,Chongqing 401331,China)
出处
《工程爆破》
北大核心
2025年第4期37-45,共9页
Engineering Blasting
基金
国家自然科学基金资助项目(52304207)
重庆市自然科学基金资助项目(CSTB2022NSCQ-MSX0335)
重庆市教委科学技术研究基金资助项目(KJQN202301525
KJQN202101529)
重庆科技大学研究生创新计划基金资助项目(YKJCX2420720)
重庆市研究生科研创新基金资助项目(CYS25833)。
关键词
多分支
冲击波
火焰传播
超压峰值
multiple branches
shock wave
flame propagation
overpressure peak
