Experimental and Numerical Study of Shock Wave Interaction with Perforated Plates
Author:
Britan A.1, Karpov A. V.1, Vasilev E. I.2, Igra O.3, Ben-Dor G.3, Shapiro E.3
Affiliation:
1. Department of Computational Mechanics, Volgograd University, Volgograd, Russia 2. Department of Computational Mechanics, Volgograd University, Volgograd, Russia 400062, Volgograd, str. 2nd Prodolnaja, 30 3. The Pearlstone Center for Aeronautical Engineering Studies, Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel
Abstract
The flow developed behind shock wave transmitted through a screen or a perforated plat is initially highly unsteady and nonuniform. It contains multiple shock reflections and interactions with vortices shed from the open spaces of the barrier. The present paper studies experimentally and theoretically/numerically the flow and wave pattern resulted from the interaction of an incident shock wave with a few different types of barriers, all having the same porosity but different geometries. It is shown that in all investigated cases the flow downstream of the barrier can be divided into two different zones. Due immediately behind the barrier, where the flow is highly unsteady and nonuniform in the other, placed further downstream from the barrier, the flow approaches a steady and uniform state. It is also shown that most of the attenuation experienced by the transmitted shock wave occurs in the zone where the flow is highly unsteady. When solving the flow developed behind the shock wave transmitted through the barrier while ignoring energy losses (i.e., assuming the fluid to be a perfect fluid and therefore employing the Euler equation instead of the Navier-Stokes equation) leads to non-physical results in the unsteady flow zone.
Publisher
ASME International
Subject
Mechanical Engineering
Reference13 articles.
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