The detonation pressure from the steady detonation of high explosives is a characteristic. Nevertheless, in materials processing using high explosives, there are cases when the detonation pressure does not match the intended pressure. In this investigation, as a new method of generating the overdriven detonation effectively, a double cylindrical high explosive set up using two kinds of explosives was developed, and its basic performance is analyzed. The concentric double cylindrical high explosive set up was composed of a high velocity explosive and a low velocity explosive, and the overdriven detonation was performed in the low velocity explosive. In this experiment, the ion gap was set up in the high velocity explosive and low velocity explosive respectively, and the detonation velocity was measured. The detonation pressure was also measured by setting up a manganin gauge (Kyowa Electric Instrument Co., Ltd.,) at the position where the generation of the overdriven detonation phenomenon was expected. Furthermore, the overdriven detonation process of the concentric double cylindrical high explosive was continually observed by numerical analysis and the framing photography. From the experimental results, the very high pressure region including the mach stem was observed in the low velocity explosive, and the overdriven detonation phenomenon was confirmed. The maximum pressure value of the concentric double cylindrical high explosive set up was 2.3 times higher than the Chapman-Jouguet pressure of the single explosive.
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e-mail: toru@shock.smrc.kumamoto-u.ac.jp
e-mail: yuichi_nakamura@nof.co.jp
e-mail: itoh@mech.kumamoto-u.ac.jp
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November 2004
Research Papers
The Performance of Pressure Vessel Using Concentric Double Cylindrical High Explosive
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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Yuichi Nakamura,
e-mail: yuichi_nakamura@nof.co.jp
Yuichi Nakamura
NOF Corporation, Taketoyo Plant Aichi Works, 61-1, Kitakomatsudani, Taketoyo-Cho, Chita-Gun, Aichi 470-2398, 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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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
Yuichi Nakamura
NOF Corporation, Taketoyo Plant Aichi Works, 61-1, Kitakomatsudani, Taketoyo-Cho, Chita-Gun, Aichi 470-2398, Japan
e-mail: yuichi_nakamura@nof.co.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
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division November 17, 2003; revision received May 30, 2004. Associate Editor: W. L. Cheng.
J. Pressure Vessel Technol. Nov 2004, 126(4): 409-413 (5 pages)
Published Online: December 1, 2004
Article history
Received:
November 17, 2003
Revised:
May 30, 2004
Online:
December 1, 2004
Citation
Hamada, T., Nakamura, Y., and Itoh, S. (December 1, 2004). "The Performance of Pressure Vessel Using Concentric Double Cylindrical High Explosive ." ASME. J. Pressure Vessel Technol. November 2004; 126(4): 409–413. https://doi.org/10.1115/1.1804201
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