Interaction of Shock Wave with Spheres on Wall

Abstract

The mechanism responsible for the high pressures generated in gas phase during the shock wave interaction with granular layer on a wall was studied experimentally and numerically. The granular layer used in experiments was composed of spheres fixed to each other and to the wall of shock tube. The pressure under the spheres was measured, and the shock wave propagation in the gas phase between the spheres was visualized by shadowgraphy. Furthermore, numerical simulations of shock wave interaction with the sphere were conducted in order to observe the shock wave propagation in a narrow space between the sphere and the end wall, and pressure distributions on the end wall of the shock tube in a qualitative manner. The correlation between the shock wave propagation along the end wall and the first peaks in the pressure traces obtained under the spheres was revealed.