H型隧道双爆源气体爆炸传播特性模拟研究

Simulation on propagation characteristics of gas explosion with double explosion sources in H-shaped tunnel

为探究H型隧道内双爆源气体爆炸传播特性,利用Fluent软件建立H型隧道双爆源气体爆炸数值模型,对H型隧道内不同聚集长度的双爆源气体爆炸传播过程进行模拟,选取甲烷/空气混合气体作为爆源气体。研究结果表明:点火后H型隧道内超压值呈现先上升达到峰值后下降的变化趋势;双爆源气体间距一定时,爆源气体聚集长度越大,爆炸超压峰值也越大;爆炸超压峰值与传播距离呈三次函数关系。研究结果可为防治气体爆炸、预防或弱化爆炸破坏效应等领域提供理论参考。

In order to explore the propagation characteristics of gas explosion with double explosion sources in H-shaped tunnel,a numerical model of gas explosion with double explosion sources in H-shaped tunnel was established by Fluent software.The propagation process of gas explosion with double explosion sources under different aggregation lengths in H-shaped tunnel was simulated,and the methane/air mixed gas was selected as the explosion source gas.The results show that after ignition,the overpressure value in the H-shaped tunnel presents a variation trend of increasing first,reaching a peak and then decreasing.When the distance between the two explosion sources gas is constant,the larger the aggregation length of the explosion source gas,the larger the peak value of explosion overpressure.The relationship between peak explosion overpressure and propagation distance is a cubic function.The research results can provide theoretical reference for the prevention and control of gas explosion,the prevention or weakening of explosion damage effect and other fields.