Visualization of an underwater explosion of spherical explosives

Akio Kira; Masahiro Fujita; Shigeru Itoh

doi:10.1117/12.294552

12 December 1997 Visualization of an underwater explosion of spherical explosives

Akio Kira, Masahiro Fujita, Shigeru Itoh

Proceedings Volume 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement; (1997) https://doi.org/10.1117/12.294552
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Akio Kira, Masahiro Fujita, and Shigeru Itoh "Visualization of an underwater explosion of spherical explosives", Proc. SPIE 3173, Ultrahigh- and High-Speed Photography and Image-based Motion Measurement, (12 December 1997); https://doi.org/10.1117/12.294552

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KEYWORDS

Explosives

Spherical lenses

Visualization

Optical testing

Cameras

Focus stacking software

Imaging systems

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