Interaction of strong shock waves with perforated stainless-steel plate in a shock tube

Abstract

The results of an experimental study of the attenuation of strong shock waves in a channel during interaction with perforated steel plates with permeability from 0.11 to 0.39 are presented. The experiments were carried out in a shock tube equipped with piezoelectric pressure transducers at initial nitrogen pressures of 10 kPa, 20 kPa and 50 kPa. Mach numbers of the shock waves were varied from 1.5 to 4.3. The pressures of the incident shock waves, reflected shock waves and transmitted shock waves were determined. Graphs of the Mach numbers of reflected and transmitted shock waves depending on the Mach number of the incident shock wave were obtained. The dependence of the attenuation of the transmitted and reflected shock waves on the Mach number of the incident shock wave and on the permeability was obtained. It was shown that the time of pressure relaxation time behind the reflected shock wave increases with increasing Mach number.