含能材料2025，Vol.33Issue(3)：213-224,12.DOI:10.11943/CJEM2024155
隧道内甲烷蒸气云爆炸特性及杀伤效应研究
Research on Combustion Characteristics and Injury Effects of Methane Vapor Clouds in Tunnels
摘要
Abstract
In order to explore the propagation patterns and characteristics of methane vapor cloud combustion waves in tunnels,the CE/SE(space-time conservation element and solution element)method in LS-DYNA software was employed to establish a pre-mixed explosion model of methane and air in the tunnel,which was validated through experimental data.In this paper,typi-cal combustion waveforms of methane vapor cloud with a concentration 9.5%in different test positions were demonstrated by numerical simulation.The propagation and evolution law of overpressure and temperature was analyzed.The injury effects of overpressure and thermal radiation on human in tunnel were investigated.It was revealed that the combustion pressure wave along the tunnel can be divided into four stages:free expansion,reflection dissipation,wall acceleration,and Mach propaga-tion.The pressure variation presented three characteristics:wall impact rise,reflective decay,and stable propagation.The pres-sure wave presented a sort of periodical reflection propagation mode radially,while the intensity was declining according to the consumption of methane.The temperature field evolved symmetrically from the ignition point to the tunnel entrance and the peak temperature decayed rapidly along the path.The temperature field radiated from the ignition point to the bottom of the tun-nel,leading to a gradual convergence of in a certain section and decreased slowly over time.For the injury effects caused by a combination of combustion overpressure and thermal radiation,the fatal distance was 13.51m,the severe injury distance was 13.51-23.51 m,the moderate injury distance was 23.51-160 m while the concentration of methane vapor cloud was 5%.For the methane vapor cloud with a concentration 6.5%,those distances were 16.46 m,16.46-45.36 m and 45.36-160 m respec-tively.As for a concentration 9.5%,the fetal distance was 20.58m and the severe injury distance was 20.58-160 m.关键词
隧道/甲烷爆炸/超压分布/温度演化/热辐射/杀伤效应Key words
tunnel/methane combustion/combustion overpressure/temperature evolution/thermal radiation/injury effects分类
武器工业引用本文复制引用
顾琳琳,徐永行,朱黄浩,王振..隧道内甲烷蒸气云爆炸特性及杀伤效应研究[J].含能材料,2025,33(3):213-224,12.基金项目
国家重点研发计划(2021YFC3002000) （2021YFC3002000）
国家自然科学基金(42002266) National Key Research and Development Program(No.2021YFC3002000),National Natural Science Founda-tion of China(No.42002266) （42002266）
