Numerical Simulation On Airflow Effects In Local Ventilate Network Of Gas Explosion

Post-disaster investigations and laboratory simulation of gas explosion found that, the damage is obvious at the bend and bifurcation of the roadway. Study on the propagation variation of shock wave and ventilated change rule of gas explosion shock wave, that will help to prevent, inhibit the occurrence of gas explosion accidents, reduce economic losses and casualties, and it is more important significance in decision-making and disaster preventing after gas explosion.Combination of different incidents, explaining the necessity and importance of the study. Theoretical analysis, numerical simulation of the gas explosion in suppressing the development of rational anti-plan, disaster prevention and control of primary, control the expansion of secondary disasters and reducing disaster losses have significance.In this paper, described the spreading process which from gas explosion shock wave's dissemination, using flow field simulation platform, based on the theoretical model of gas explosion, simulate and qualifiedly analyze the spreading process of gas explosion.Through theoretical calculation and simulation model of the comparative analysis that:in the other conditions are the same, with the gas production rate, maximum pressure gas explosion peak absolute increase,200m3 explosive gas air mixture than 100m3 air mixture explosion of gas strength to a large, destructive too large, the simulation results compared with the experimental results that the simulation of this basic research to the quantitative accuracy of explosion propagation process can effectively simulate the process of gas explosion propagation, provide a scientific basis for the accident investigation.