煤矿安全2018，Vol.49Issue(1)：183-186,4.DOI:10.13347/j.cnki.mkaq.2018.01.049
基于FLACS的煤矿巷道截面突变对瓦斯爆炸的影响数值模拟
Numerical Simulation Study on Effect of Tunnel Section Mutation on Gas Explosion Based on FLACS
摘要
Abstract
To investigate the propagation characteristics of gas explosion under complex conditions of coal mine tunnels,the effect of tunnel section mutation on pressure,temperature,flame propagation and velocity in the process of gas explosion was examined by FLACS simulation.The results show that the pressure peak and temperature peak of measuring points were obviously higher when the tunnel section was mutated.With the sudden expansion of cross-sectional area expanding in tunnel,the area of flame peak surface became larger while the speed of flame propagation got slower.Conversely,with the sudden contraction of cross-sectional area shrinking in tunnel,the more pronounced turbulence occurred when flame propagated to a sudden contraction section,which speeded up flame propagation.Simultaneously,the flame peak area was stretched.In addition,the turbulence intensity of air flow was increased by the cross section mutation of tunnel,which speeded up the reaction rate of explosion.Accordingly,flame propagation in the tunnel with cross section mutation was faster than that in the tunnel with unchanged cross section.关键词
瓦斯爆炸/数值模拟/截面突变/火焰传播/湍流强度Key words
gas explosion/numerical simulation/section mutation/flame propagation/turbulence intensity分类
矿业与冶金引用本文复制引用
罗振敏,苏彬,程方明,张娟..基于FLACS的煤矿巷道截面突变对瓦斯爆炸的影响数值模拟[J].煤矿安全,2018,49(1):183-186,4.基金项目
国家自然科学基金资助项目(51674193) （51674193）
陕西省科技攻关资助项目(2015SF280) （2015SF280）
陕西省自然科学基础研究计划面上资助项目(2017JM5068) （2017JM5068）
