Modeling of the interaction between an air shock wave and a porous screen

Some specific features of the reflection of air shock waves from a rigid wa ll coated with the layer of a porous substance is studied numerically. A ma thematical two-speed model with two stress tensors that has been constructe d by methods of the mechanics of multiphase media is used for studying the wave processes in saturated porous media. The numerical-modeling technique based on the Lax-Wendroff two-step scheme is developed. The processes of pa ssage of a "ledge"-type wave through the "gas-porous medium" interface and of reflection from a rigid wall covered with a porous material are consider ed, the effect of the porous-medium and wave parameters on the reflection i s analyzed. and the numerical results are compared with the experimental da ta obtained by other authors.