瓦斯爆炸波自激励效应的实验研究

基于爆炸波的发展机理在气体爆炸防护技术研究中的重要性,通过实验对密闭通道中瓦斯爆炸波的传播特征及规律进行了研究。结果表明,瓦斯爆炸传播过程中,压力波对火焰波既有促进作用又有抑制作用,不同阶段的主导作用不同;而火焰波对压力波也会产生影响,不但会加强压力波的超压和振幅,而且会使压力波上升段压缩、下降段拉伸,最终可能发展为爆震波,对巷道内的建筑、设备造成极大的破坏。

Experimental Study on the Self-oscillation Laws of Gas Explosion in Tube

Based on the importance of the mechanism of gas explosion wave development and diffusion in research of safety engineering and technology,an experiment on the characteristics and laws of gas explosion expansion in tube is studied.According to the experimental result,in the process of gas explosion expansion in tube,the pressure wave can accelerate or hold back the flame wave.The main effect is different in different phases.At the same time,the flame wave can also react on the pressure wave.On the one side,the pressure swing increases in the effect of flame wave,on the other side,the rising phase of pressure is compressed and the dropping is elongated.In the effect of flame wave,the pressure wave can become shock wave which is the main cause of the tunnel destruction.