Interaction of a normally incident shock wave with a porous material layer on a solid wall

Abstract

Interaction of an incident shock wave with a layer of a porous material located near a solid wall is studied with the use of two mathematical models. The layer is modeled by a mixture of solid and gaseous phases. The mathematical models used are the equations of mechanics of equilibrium heterogeneous media with allowance for the gas pressure only and the model of two compressible media with identical partial pressures of the components. Verification of the approaches used is performed by comparisons of numerical results with experimental data.

Experimental Study on Gas Explosion Propagation in Porous Metal Materials

“…At this time, even if the temperature of the mixture remains unchanged, it can still lead to self-ignition. Therefore, there are two theories to explain that porous metal materials can quench a flame [7,12,34,35]. One is the thermal theory, and the other is the chain reaction theory.…”

“…On the other hand, the propagation of explosion waves in porous materials produces reflection, diffraction and other effects, so that the explosion waves cancel each other out and wave attenuation is caused [11,12]. When the explosion waves enter the porous metal material, a part of the explosion waves and gases enter the inner layer, and the other parts are reflected by the surface of the porous metal material.…”

“…Teodoreczyk et al found that the porous materials can obviously attenuate the explosion wave intensity and the porous material installed on the tube wall can effectively suppress the detonation wave [11]. Fedorov et al studied the effects of porous materials on explosion waves, and found that porous materials can substantially attenuate explosion waves [12]. Mehrjoo et al used the attenuation of the transverse wave on a porous wall to describe the influence of instability on the diffraction failure mechanism of a detonation wave [13].…”