Pressure Measurement and Flow Visualization of Shock Wave Propagation in Air and Water with a Filter

Abstract

Propagation of shock waves generated by explosions is one of the important research topics in safety engineering. Thus, shock wave attenuation using filters has been investigated. In this study, the flow in the vicinity of a filter installed in air and water was visualized by the Schlieren method using a shock tube with a square section. In air, the shock wave was weakened by the filter. However, the filter was greatly deformed by the flow behind the shock wave. In water, no shock wave propagated behind the filter. Slight deformation was noted on the filter in water due to the flow that passed through the filter. Moreover, the flow speed behind the filter was suppressed as the number of cells in the filter was increased.