一般空气区内煤尘爆炸冲击波在弯道内传播规律研究

煤尘爆炸冲击波传播规律是研究冲击波的破坏和伤害机理的前提及依据,基于流体动力学、爆炸动力学理论研究巷道转弯情况下煤尘爆炸冲击波传播规律.依据斜激波在弯道内的传播规律,建立了在巷道转弯情况下一般空气区煤尘爆炸冲击波传播的数学模型,推导出冲击波在弯道内传播规律的表达式.采用冲击波波阵面后突跃的参数来表征冲击波,进而推导出冲击波在巷道转弯时的传播规律的简化公式,分析得出冲击波初始压力、转弯角度越大衰减系数就越大,与试验结果进行对比分析,验证了理论推导的结果.

Research on theoretical spreading law of shockwave of coal dust explosion in general air area in laneway corner

The spreading theoretical law of shockwave of coal dust explosion is the pvemise and poundation to study the mechanism injury and damage.This paper analyzed the theoretical spreading law in the laneway corner based on the theory of flow dynamics and explosive dynamics.According to the spreading law of oblique shock wave,this paper is to set up the mathematical model of the shockwave spreading of coal dust explosion in general air area in laneway corner and deduce the corresponding equation.By using the suddenly jump parameters of wave front to represent the shockwave,the paper derived the simplified equation of spreading law in the laneway corner.Research indicates that the attenuation coefficient of shockwave of coal dust explosion increase with the initial shockwave pressure and angle of the laneway corner rising.By contrastive analysis of the spreading law and experimental results,the results of theoretical derivation were ueripied.