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Proceedings Paper

Visualization of an underwater explosion of spherical explosives
Author(s): Akio Kira; Masahiro Fujita; Shigeru Itoh
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Paper Abstract

The behavior of underwater shock waves generated by underwater explosion of high explosives have been investigated for many years. On spherical explosives, the behavior of underwater shock waves have also been investigated by many researchers, and the strength of the underwater shock wave far from the origin of the explosives have been known. However, there has not been the information concerning the strength or the attenuation process of the underwater shock wave close to the origin of the explosives. Therefore, the underwater shock wave close to the spherical explosives was observed by optical measurements. The results obtained by the optical measurements were compared with the results obtained by numerical calculation and pressure measurement. An arbitrary Lagrangian- Eulerian (ALE) method was used in our basic calculations. Tourmaline gauges were used in pressure measurement. The usual shadowgraph system was used to take both framing and streak photographs with an image converter camera. It concludes that the strength of the underwater shock wave decreases exponentially with the increase of distance from original explosives, and its inclination of the line was about minus 2.5 in the case of the spherical SEP and was about minus 1.8 in the case of the spherical PBX.

Paper Details

Date Published: 12 December 1997
PDF: 5 pages
Proc. SPIE 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement, (12 December 1997); doi: 10.1117/12.294552
Show Author Affiliations
Akio Kira, Kumamoto Univ. (Japan)
Masahiro Fujita, Kumamoto Univ. (Japan)
Shigeru Itoh, Kumamoto Univ. (Japan)


Published in SPIE Proceedings Vol. 3173:
Ultrahigh- and High-Speed Photography and Image-based Motion Measurement
C. Bruce Johnson; Andrew Davidhazy; James S. Walton; Takeharu Goji Etoh; C. Bruce Johnson; Donald R. Snyder; James S. Walton, Editor(s)

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