受限空间瓦斯爆炸反射波及对火焰传播的影响

Influence of Reflected Wave of Gas Explosion on Flame Transmission in Confined Space

在研究了一维受限空间中固体壁面反射波特征的基础上,采用实验方法研究了该反射波对瓦斯爆炸过程中火焰传播特性的影响作用.研究结果表明:当一维受限空间中固体壁面反射波与火焰面相遇时,可使火焰速度迅速下降,然后火焰再加速,形成二次加速,该反射波强度较高,抑制作用增强时,可使火焰熄灭;当反射波在内部与火焰相遇时(火焰锋面已过),对火焰传播速度不产生影响,但可造成火焰内部的分离现象.

On the basis of studying the characters of reflected wave of solid surface in one-dimensional confined space, the influence of reflected wave on flame transmission in gas explosion was investigated by lab experiments. The results show that the velocity of flame transmission decreases rapidly because the reflected wave of solid surface encounters with the flame in one-dimensional confined space, then the flame accelerates again and forms secondary speed-up. If the intensity and restriction function of the reflected wave increase, the flame dies. When the reflected wave encounters with the flame in the interior of the flame, the velocity of flame transmission does not change but the separation of the flame can be brought in the interior.