On Generation of Ultra-High Pressure by Converging of Underwater Shock Waves

[+] Author and Article Information
S. Itoh, S. Kubota, S. Nagano, M. Fujita

Department of Mechanical Engineering, Faculty of Engineering, Kumamoto University, Kurokami 2-39-1, Kumamoto 860, Japan

J. Pressure Vessel Technol 120(1), 51-55 (Feb 01, 1998) (5 pages) doi:10.1115/1.2841884 History: Received April 15, 1997; Revised July 15, 1997; Online February 11, 2008


The characteristics of a new assembly for the shock consolidation of difficult-to-consolidate powders, such as inter-metallic compounds or ceramic materials, were investigated by both the experimental method and numerical simulation method. The assembly consists of an explosive container, a water chamber, and a powder container. Once the explosive is detonated, a detonation wave occurs and propagates, and then impinges on the water surface of the water chamber. After that, there occurs immediately an underwater shock wave in the water chamber. The underwater shock wave interacts with the wall of the chamber during its propagation so that its strength is increased by the converging effect. We used the usual shadow graph system to photograph the interaction process between detonation wave and water. We also used a Manganin piezoresistance gage to measure the converged pressure of the conical water chamber. Finally, we numerically investigated, in detail, the converging effects of the various conical water chambers on the underwater shock waves. The experimental results and the correspondingly numerical results agree quite well with each other.

Copyright © 1998 by The American Society of Mechanical Engineers
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