Dynamics Simulation Research Of Gas Explosion Caused By Shock Waves

As the big hidden trouble of safety in the national production, gas explosion alwaysthreaten the normal development of the production and people’s normal life. Over the years ofgas explosion, the state, enterprises and the relevant departments have payed more attention toit in the coal mine. From the characteristics of shock waves and the reaction mechanism of gasexplosion, this article reviews the present situation of our country and abroad, draws theconditions and relevant theories of gas explosion caused by the shock waves, establishesmathematical and physical model, analysises the dynamic characteristics of gas explosioncaused by shock waves, presents the numerical simulation conclusions of gas explosion by theshock waves.This article provides theoretical exploration and reference value for the preventionof gas explosion.According to research in this paper, the conclusions we draw as follow:From the process of gas explosion caused by the shock waves, velocity and pressure haveundergone a similar change.In the same gas concentration range, the overpressure, dynamicpressure, speed, temperature, reaction speed and density caused by simple ignition combustionare not stronger than that caused by the shock wave.With the ratio of the pipeline length anddiameter increasing, the explosion reaction process will become easier.From the temperatureand combustion rate change of the initial reaction surface, we can verify that the temperatureincreasing and combustion rate have the relation of mutual cancellation with each other.Fromthe change of the initial surface pressure and combustion rate, we can verify the incentive effectof the shock waves pressure and combustion rate.From effect of the initial side, we can alsoverify the change trend of the explosion propagation process.