不同总量沉积煤尘在瓦斯爆炸诱导下的传播规律模拟研究

应用连续相、颗粒相计算方法对瓦斯爆炸诱导不同量沉积煤尘参与爆炸进行数值模拟,对煤尘参与爆炸的行为机理进行了研究。结合瓦斯爆炸传播的两波三区结构理论,以及冲击气流对诱导煤尘颗粒飞扬、点火过程,分析了不同总量煤尘条件下的爆炸火焰发生情况及其作用机理,并对不同模式下煤尘区的冲击波和火焰传播的规律进行定量讨论,为认清瓦斯爆炸诱导沉积煤尘爆炸的机理,有效预防瓦斯煤尘爆炸提供理论基础。

Simulation Study on Propagation Law of Different-amount Deposited Coal Dust Explosion Induced by Gas Explosion

Numerical simulation on different-amount deposited coal dust explosion induced by gas explosion was carried out by using the continuous phase and particle phase calculation methods and study was made on the behavior mechanism of coal dust explosion.Analysis was conducted on the generation condition and action mechanism of explosion flame of the deposited coal dust in different amounts according to the two-wave and three-zone structural theory of gas explosion propagation as well as the ignition process and dust particles flying induced by the impact airflow,and quantitatively discussion was carried out on the shock waves and flame propagation law in coal dust area under different modes.These analysis and studies can provide theoretical basis for recognizing the explosion mechanism of deposited coal dust explosion induced by gas explosion and effectively preventing gas and dust explosion.