Author(s)

K. Kitagawa, M. Kainuma, K. Takayama, M. Yasuhara

Abstract

Interactive effect of shock wave with porous foam K. Kitagawa\ M. Kainuma\ K. Takayama^ M. Yasuhara* ^Department of Mechanical Engineering, Aichi Institute of Technology, Japan ^ Shock Wave Research Centre, Institute of Fluid Science, Tohoku University, Japan Abstract Collision of a planar shock wave with porous foam is investigated experi- mentally by holography as well as numerically. We investigate the unsteady process occurring when a shock wave passes through porous material. Experiments on shock wave-foam interaction are conducted by using a shock tube. Experimental form of polyurethane foam is of 60mm x 150mm cross section with 1200mm long (open cell type, high-porosity ^=0.974 ~ 0.987 and low density pc=16~31kg/m^). The deformation and wave propagation in the foam is visualized by using single-exposure holographic interferometry and high speed video. The compression wave in the foam moves at lower velocity than the shock wave (Ms=1.19). When the incident shock wave h

Keywords