音響インピーダンスの異なる材料を用いた円管内発生衝撃波挙動に関する研究

抄録

This paper reports experimental results of underwater shock wave phenomena in a tube made of materials with different acoustic impedance for an establishment of a new shock wave pressure control method related to the shock wave medical and biomedical application. In this study, underwater shock wave was generated by an explosion of micro-explosive (a 10 mg silver aide pellet) in a metal tube as a closed space. The process of underwater shock wave generation phenomena from a metal tube was visualized by the shadowgraph method and recorded by high-speed framing camera. The pressure history of generated shock wave was measured simultaneously by a needle hydrophone. The peak overpressure of induced underwater shock wave from a metal tube in the case of stainless steel was larger and faster than that in the case of aluminum due to differences in acoustic impedance value.