SHOCK WAVE REFLECTION FROM HIGHLY POROUS BARRIERS WITH INHOMOGENEOUS STRUCTURES
S. G. Mironov, T. V. Poplavskaya, S. V. Kirilovskii, I. S. Tsyryul’nikov
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: highly porous barrier, shock wave reflection, shock tube experiment, RANS simulation
Abstract
This paper presents combined experimental and numerical results on the interaction of shock waves with highly porous, permeable barriers featuring both homogeneous and inhomogeneous spatial structures. The experiments are conducted in a shock tube for shock Mach numbers ranging within M = 1.2÷1.8. The experimental barriers comprise stacked wire meshes with triangular cells and layers of cellular nickel foam. The numerical simulations are based on the Reynolds-averaged Navier-Stokes (RANS) equations, utilizing a toroidal skeletal model for the porous media. The results demonstrate that minimal shock wave reflection is achieved using graded barriers, which consist of a sequence of mesh layers with progressively decreasing cell size, capped by a layer of fine-pore nickel foam.
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