Shock Waves during Detonation of Hydrogen–Air Mixture Confined by a Movable Thin-Walled Shell

The article presents the analysis of numerical simulation results for the parameters of air shock waves formed during detonation of a hydrogen–air mixture volume limited by a movable shell. The calculations were performed using the GasDynamicsTool package in a two-dimensional formulation. The propagation of detonation and shock waves in a channel of constant cross-section was considered. The volume with the reacting mixture is separated from the environment (air) by a movable thin-walled membrane (shell). When exposed to a detonation wave, the membrane starts moving and an air shock wave is formed in front of it. The flow features caused by the reflection of the detonation wave on the membrane were revealed. It was found that with a relatively small membrane mass, the effect of the explosion can be enhanced. Data were obtained on the dynamics of membrane acceleration depending on its mass. The results of numerical calculations substantiate the possibility of experimental modeling of explosions of fuel-air clouds with a free boundary with an appropriate choice of material and thickness of the shell limiting the combustible mixture.