Propagation of Acoustic Waves through Regions of Non-Uniform Temperature

Abstract

The reflection and transmission of acoustic waves through regions of non-uniform temperature in a gas medium was numerically studied. The propagation of planar sound waves through the various finite-length non-uniform gas regions was investigated by solving the unsteady one-dimensional Euler's equations using a finite-difference scheme. The main thrust of the investigation was to determine the effectiveness of using glow discharge plasma as sound barriers in aerospace applications. The effect, on sound transmission, of the length and shape of the high-temperature zone characterizing the plasma was determined.