巷道中瓦斯爆炸诱导激波传播特性研究

利用AutoReaGas软件,数值模拟巷道中瓦斯浓度和火源对瓦斯爆炸传播的影响,其计算结果表明:爆炸静态超压随着传播距离的增加而减小,而爆炸动压随着传播距离的增加而增大;点火位置距离巷道封闭端越近,各测点得到的爆炸静态超压值越大;瓦斯浓度对爆炸峰值超压影响显著,当浓度为9.5%的氧化反应当量比浓度时,得到的最大峰值超压为70.95kPa,爆炸威力最大。

Study on Propagation Characteristics of Blast Waves Induced by Gas Explosion in Tunnels

The influences of the gas concentration and ignition location on the characteristics of gas explosion in a tunnel were simulated by AutoReaGas software.Numerical calculation results show that the maximum explosion static overpressure decreases with the increase of the propagation distance,while the explosion dynamic pressure increases with the increase of the propagation distance.With the decrease of the distance of ignition location close to the blind end in a tunnel,the maximum explosion static overpressure obtained at each gauge increases.The gas concentration has a significant influence on the maximum explosion static overpressure.With the gas stoichiometric ratio concentration of 9.5%,the explosion power is the most violent,and the maximum explosion overpressure obtained is 70.95 kPa.