An explosive configuration was studied so that the underwater shock wave converges at the tip of the explosive, and a three-dimensional spiral configuration was obtained. This spiral configuration need to be analyzed theoretically due to the relation of propagation velocity of underwater shock wave, detonation velocity of the explosive and a configuration of vessel to charge the explosive. In order to study an effect of the convergence, pressure measurement at the spiral center was carried out by using a manganin gauge. Therefore, when SEP was used in this experiment, the maximum pressure value was 17.7 GPa. This maximum pressure value is higher than the pressure value of underwater shock wave generated from the underwater explosion of a straight configuration. Furthermore, this maximum pressure value was higher than C-J pressure of SEP. An initial pressure of underwater shock water shock wave that can obtain from an isentropic expansion curve of SEP and a characteristic curve of water is 5.7 GPa, and C-J pressure of SEP is 15.9 GPa. From the above-mentioned, the effect of spiral convergence could be shown well.
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High Pressure Generation Using Underwater Explosion of a Spiral Explosive in a Conical Vessel
Toru Hamada,
e-mail: toru@shock.smrc.kumamoto-u.ac.jp
Toru Hamada
Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555, Japan
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Shigeru Itoh,
e-mail: itoh@mech.kumamoto-u.ac.jp
Shigeru Itoh
Shock Wave and Condensed Matter Research Center, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555, Japan
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Kenji Murata,
Kenji Murata
NOF Co., Aichi Branch, Taketoyo, Aichi 470-2379, Japan
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Yukio Kato
Yukio Kato
NOF Co., Aichi Branch, Taketoyo, Aichi 470-2379, Japan
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Toru Hamada
Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555, Japan
e-mail: toru@shock.smrc.kumamoto-u.ac.jp
Shigeru Itoh
Shock Wave and Condensed Matter Research Center, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555, Japan
e-mail: itoh@mech.kumamoto-u.ac.jp
Kenji Murata
NOF Co., Aichi Branch, Taketoyo, Aichi 470-2379, Japan
Yukio Kato
NOF Co., Aichi Branch, Taketoyo, Aichi 470-2379, Japan
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division May 27, 2003; revised manuscript received June 22, 2003. Associate Editor: S. Y. Zamrik.
J. Pressure Vessel Technol. May 2004, 126(2): 258-263 (6 pages)
Published Online: May 5, 2004
Article history
Received:
May 27, 2003
Revised:
June 22, 2003
Online:
May 5, 2004
Citation
Hamada, T., Itoh, S., Murata , K., and Kato , Y. (May 5, 2004). "High Pressure Generation Using Underwater Explosion of a Spiral Explosive in a Conical Vessel ." ASME. J. Pressure Vessel Technol. May 2004; 126(2): 258–263. https://doi.org/10.1115/1.1687385
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