Simulation on propagation characteristics of gas explosion with double explosion sources in H-shaped tunnel
In order to explore the propagation characteristics of gas explosion with double explosion sources in H-shaped tun-nel,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 decrea-sing.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.
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