摘要
为了研究细水雾在负压效应下对管道内甲烷爆炸传播的影响,本研究通过自主搭建的实验平台,探讨了9.5%CH_(4)/Air预混气体爆炸过程中的细水雾作用。实验采用有机玻璃管道系统,模拟煤矿井下巷道结构,分析了细水雾对爆炸超压、火焰传播速度及火焰特性的影响。结果表明:细水雾能有效降低爆炸超压和强度,同时引发火焰驻停和逆流现象。细水雾使燃烧区温度下降,管内压力低于外部大气压,形成负压区域,导致气流回流速度大于火焰传播速度,从而抑制火焰传播。细水雾在低速传播火焰时抑制效果显著,而在高速传播时效果微弱。此外,长管道内多喷头协同工作时,喷头间距和配置显著影响火焰逆流的频率和持续时间。细水雾通过物理和化学作用可有效抑制甲烷爆炸传播,尤其在火焰低速传播阶段效果显著,可作为煤矿井下安全防护的有效技术手段。
To investigate the influence of fine water mist on gas explosion propagation in pipelines under adverse pressure conditions,an experimental platform was designed and built to explore the effect of fine water mist on the explosion characteristics of 9.5%CH_(4)/Air premixed gas.The experimental study employed a transparent acrylic pipeline system to simulate underground coal mine tunnel structures.It systematically investigated the influence of fine water mist on explosion overpressure,flame propagation velocity,and combustion characteristics.The experimental results demonstrate that fine water mist can significantly attenuate explosion overpressure and intensity while inducing flame quenching and backflow phenomena.Through thermal absorption in the combustion zone,the water mist reduces internal tube pressure below atmospheric levels,creating a negative-pressure zone where airflow reversal exceeds the flame-propagation velocity,effectively suppressing flame advancement.Experimental results reveal that fine water mist exhibits strong suppression of low-velocity flame propagation but is less effective against high-velocity flames.Furthermore,in extended pipeline systems with multiple nozzles,the spatial arrangement and configuration of the nozzles critically influence both the frequency and duration of flame backflow.Fine water mist demonstrates significant suppression of gas explosion propagation through combined physical and chemical mechanisms,particularly during low-velocity flame propagation phases,making it a viable safety technology for coal mine explosion mitigation.
作者
夏静怡
邓雨萱
李佳霜
路长
陈硕
XIA Jing-yi;DENG Yu-xuan;LI Jia-shuang;LU Chang;CHEN Shuo(School of Chemistry&Environmental Engineering,Sichuan University of Science&Engineering,Zigong 643002,China;School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China)
出处
《爆破》
北大核心
2026年第1期225-234,共10页
Blasting
基金
国家自然科学基金项目(51974107)基于减速条件下巷道瓦斯爆炸的阻隔爆新方法研究
河南省科技攻关计划项目(222102320142)含添加剂双流体细水雾抑制外浮顶罐密封圈火灾关键技术及装备。
关键词
细水雾
甲烷爆炸
爆炸超压
火焰传播速度
减速逆流
water mist
methane explosion
explosion overpressure
flame propagation speed
deceleration countercurrent
