Detonation Propagation and Quenching in a Semi-Confined Layer of a Hydrogen–Air Mixture

The results of numerical simulation of the propagation of a detonation wave in a layer of a combustible gas mixture bounded on one side by a wall and, on the other, by a volume filled with an inert gas are analyzed. The calculations are performed using the GasDynamicsTool package in a two-dimensional formulation for a model gas with the parameters corresponding to a stoichiometric hydrogen–air mixture. The evolution of the cellular structure of a detonation wave during its propagation along a semi-confined layer is analyzed. It is shown that with an increase in the layer thickness, the distance at which the detonation decays exponentially increases. The problem of mitigating an explosion by creating an intermediate inert gas layer separating the combustible mixture from the protected surface is considered. It is established that the detonation wave is effectively quenched when the thickness of the inert layer corresponds to the size of the detonation cell.