壁面粗糙度对瓦斯爆炸火焰波传播的影响

Influence of Wall Roughness on Flame Transmission of Gas Explosion

在实验研究的基础上,分析了壁面粗糙度对瓦斯爆炸过程中火焰传播规律的重要影响.研究结果表明,壁面粗糙度对瓦斯爆炸过程的影响很大,相比光滑管道,粗糙管的火焰速度大幅度提高;对于管道终端闭口系统和开口系统的瓦斯爆炸过程,壁面粗糙度对两种系统的影响规律是一致的,影响程度比较接近.基于壁面粗糙度对瓦斯爆炸影响的实验结论,从理论上分析了壁面粗糙度对高速传播的火焰区的影响,并对实验现象做出了合理解释.因此,在矿井开拓中,应尽可能减小巷道壁面的粗糙度.研究结果对指导现场如何防治瓦斯爆炸,减轻瓦斯爆炸的威力具有重要作用.

On the basis of the experimental research, the significant influence of the wall roughness on the flame transmission law of the gas explosion was analyzed. The research result shows that the wall roughness has great effects on flame transmission in gas explosion. Compared with the smooth tube, the flame speed in the rough tube increases very quickly. The influence of the wall roughness on the closed system is same as on the uncorked system in gas explosion. Based on the experimental results the influence of wall roughness on high speed flame area was analyzed. Therefore, in the coal mining, the wall roughness should be decreased as much as possible. The research results can play an important role in gas explosion to lighten the transmission of the explosion power in the mine field.