Investigation on the Interactions of Gas Explosion Flame and Reflected Pressure Waves in Closed Pipes

Abstract

In the present research work, the basic concepts of the coupling interaction mechanisms of gas explosion–reflected over pressure and flame were outlined by experiments and theory analysis. During the test processes, high speed cameras were employed for shooting the flame images, and pressure and flame sensors were set along the pipes for the signals detection. The research results show that the reflected reverse pressure wave has a significant influence on the transmission properties of gas explosion flame in the closed pipes. Under the effects of reversed pressure waves, gas explosion flames also present several discontinuous characteristics, such as flame ruptures or extinguishing. Generally, it can be inferred that the main effects of reflected explosion pressure on the flame propagations in the closed pipes are inhibitions. The present research results of these studies are shown to allow for a significant improvement in our ability to address practical problems of coal mine gas explosion mitigations.