瓦斯爆炸气相爆轰参数的数值计算与分析

Numerical calculation and analysis of the detonation parameters in gaseous phase during gas explosion

结合所建立的掘进巷道瓦斯爆炸的物理模型,当已知瓦斯聚积位置、体积和浓度时,利用Hugoniot方程和Rayleigh方程推导出了瓦斯爆轰参数的公式。同时,给出了在瓦斯强爆轰、弱爆轰和瞬时爆轰三种情形下的气相爆轰参数的表达式。利用爆轰波理论和流体动力学理论对算例进行验证,并且对结果进行了讨论和分析后认为,爆轰产物组分与温度和压力密切相关,在对爆轰波参数进行精确计算时,需要考虑爆轰温度和压力条件。

With the combination of the physical model based on excavation roadway during gas explosion, the gaseous phase detonation parameters are deduced on the conditions of the known gas congestion position, volume and concentration. Using the Hugoniot and Rayleigh equations, the expressions of detonation are given in the strong, weak and instantaneous detonation states respectively. Using the detonation theory and fluid dynamics theory, the expressions are verified, discussed and analyzed by the example. Moreover, the composition of gas detonation is very concerned with the detonation temperature and pressure which is necessarily considered while computing the detonation wave parameters accurately.