Focusing of shock waves in water and its observation by the schlieren method

Kohji Isuzugawa; Michio Horiuchi; Yoshiyuki Okumura

doi:10.1117/12.24099

1 April 1991 Focusing of shock waves in water and its observation by the schlieren method

Kohji Isuzugawa, Michio Horiuchi, Yoshiyuki Okumura

Proceedings Volume 1358, 19th Intl Congress on High-Speed Photography and Photonics; (1991) https://doi.org/10.1117/12.24099
Event: 19th International Congress on High-Speed Photography and Photonics, 1990, Cambridge, United Kingdom

Abstract

A spherical shock wave is generated by one spark discharge between electrodes at the first focal point of a rotationally symmetrical semiellipsoid, a part of the spherical wave reflects from the semiellipsoid, and produces a high pressure near the second focal point. This characteristic is used for the extracorporeal shock wave lithotriptor. However, there are some points to be made clear, such as the mechanism of shock wave generation and the process of its reflection and focusing. In this study, as the first step, visualizing the behavior of the shock wave is tried by means of the schlieren system using an iris instead of the knife edge. Especially in order to make the aspect of reflection clear, cylindrical shock waves generated by underwater wire explosions are used with an elliptical reflector. Photographs are taken with the image converter camera 'IMACON 790', and as the result the whole process from the generation to the focusing of the shock wave is clearly shown.

Citation Download Citation

Kohji Isuzugawa, Michio Horiuchi, and Yoshiyuki Okumura "Focusing of shock waves in water and its observation by the schlieren method", Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); https://doi.org/10.1117/12.24099

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