瓦斯爆炸诱导沉积煤尘爆炸的数值模拟

Numerical simulation of coal dust explosion induced by gas explosion

建立了描述瓦斯爆炸卷扬沉积煤尘参与爆炸的物理和数学模型,借助流场模拟平台,对瓦斯爆炸卷扬沉积煤尘参与爆炸的过程进行了数值模拟;并把模拟值与实验值进行了对比;对爆炸过程中的速度场和温度场进行了深入的分析。通过比较分析爆炸压力、速度场以及温度场,认为模拟结果清楚地展现了沉积煤尘的扬起和爆炸过程,达到了瓦斯爆炸诱导沉积煤尘爆炸数值模拟的要求。

Physical and mathematical models were developed to describe the kicking-up and explosion process of deposited coal dust due to gas explosion.Based on the developed models,the process,in which the deposited coal dust was kicked up and involved in gas explosion,was numerically simulated by using the commercial computational fluid dynamics（CFD）code,FLUENT.The simulated results were compared with the experimental results,and the velocity and temperature fields in the explosion process were analyzed.Analyses on the explosion pressure,velocity and temperature fields display that the simulated results can expressly exhibit the kicking-up and explosion process of deposited coal dust.