不同泄爆位置对甲烷/空气爆炸特性的影响

Influence of different explosion venting positions on methane/air explosion characteristics

为了研究泄爆口位置对甲烷/空气预混气体爆炸特性的影响,利用瓦斯爆炸实验平台开展了不同泄爆口位置对甲烷/空气预混气体爆炸特性实验研究。结果表明:随着泄爆口与点火源之间距离的增加爆炸火焰传播峰值速度逐渐增加,除泄爆口距点火源为750 mm的工况外,爆炸峰值压力也随泄爆口与点火源之间距离的增加而增加;甲烷/空气预混气体在泄爆口距点火源为1000 mm的实验条件下能够产生最大火焰传播速度和爆炸峰值压力,速度和压力峰值分别为20.25 m/s、225.56 kPa;泄爆口距离点火源越近,管道内甲烷/空气混合气体爆炸危险性越低。

In order to study the influence of the explosion venting position on the explosion characteristics of methane/air premixed gas,the experimental study on the explosion characteristics of methane/air premixed gas with different explosion venting positions was carried out using the gas explosion experimental platform.The results show that:with the increase of the distance between the explosion vent and the ignition source,the peak speed of explosion flame propagation increases gradually.Except for the condition where the explosion vent is 750 mm away from the ignition source,the peak explosion pressure also varies with the explosion vent and the ignition source.The maximum flame propagation velocity and explosion peak pressure can be generated by the methane/air premixed gas under the experimental conditions that the distance between the explosion vent is 1000 mm from the ignition source,and the peak velocity and pressure are 20.25 m/s and 225.56 kPa.The closer the explosion vent is to the ignition source,the lower the explosion risk of the methane/air mixture in the pipeline.The research results can provide theoretical basis for the design of pressure relief position.