Results 211 to 220 of about 2,176 (262)
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Underwater explosion of spherical explosives
Journal of Materials Processing Technology, 1999Abstract Underwater explosion of high explosive generates underwater shock waves. This phenomenon has been observed by optical measurement. Propagation histories of underwater shock waves in the range close to explosive have been obtained by processing photographs.
Akio Kira, Masahiro Fujita, Shigeru Itoh
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Underwater electrical wire explosion
2007 16th IEEE International Pulsed Power Conference, 2007Summary form only given. We report on experimental and computer modeling research of underwater electrical wire explosions (UEWE) which present a promising method tor generation of strong shock waves (SSW) and non-ideal plasma. Micro-and nano-second time scale generators for UEWE of Al, Cu and W wires were employed.
Ya. E. Krasik +8 more
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The Underwater Detection of TNT Explosive
IEEE Transactions on Nuclear Science, 2011Tagged neutron inspection system was used for the underwater detection of explosives. Neutrons were produced in the d + t nuclear reaction with API 120 sealed tube neutron generator. Five kilograms of TNT explosive were measured in a pool filled with water. Measurements were done in target in, target out configuration.
Sudac, Davorin +3 more
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Numerical modeling of an underwater explosion for an aluminized explosive
AIP Conference Proceedings, 1998Underwater explosion properties of an aluminized explosive were numerically modeled by two burn techniques; a programed-burn and a reaction rate calibrated from two-dimensional steady-state detonation experiments. The programed-burn technique did not reproduce experimental data well; 33% error in peak pressure of shock wave and 9% error in bubble ...
J. H. Kuk, J. Lee, S-y. Song, Y. S. Cho
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Journal of Pressure Vessel Technology, 1997
A cylinder expansion test for high explosives was carried out to determine JWL parameters. Using the JWL parameters, we carried out numerical simulations of the underwater shock waves generated by the underwater explosion of the high explosives. Our results showed that the behavior of the underwater shock waves at the vicinity of the explosives differs
S. Itoh, Z. Liu, Y. Nadamitsu
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A cylinder expansion test for high explosives was carried out to determine JWL parameters. Using the JWL parameters, we carried out numerical simulations of the underwater shock waves generated by the underwater explosion of the high explosives. Our results showed that the behavior of the underwater shock waves at the vicinity of the explosives differs
S. Itoh, Z. Liu, Y. Nadamitsu
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Emission by underwater explosions
Geophysics, 1970Abstract Theoretical and experimental investigations of the seismic effects of underwater explosions of dynamite charges are described. We investigate the acoustic efficiency in a broad frequency band and in the seismic frequency band, the partition of energy between the shock wave and bubble pulses, the seismic effects of cavitation ...
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The Journal of the Acoustical Society of America, 1976
Explosions have been used as underwater acoustic sources for many years, sometimes at rates exceeding 50 000 charges a year. During the past decade the types of studies undertaken with explosion sources have changed in character, and the requirements on charge levels have become more demanding. For example, an accuracy of ±1 dB in narrow-band levels is
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Explosions have been used as underwater acoustic sources for many years, sometimes at rates exceeding 50 000 charges a year. During the past decade the types of studies undertaken with explosion sources have changed in character, and the requirements on charge levels have become more demanding. For example, an accuracy of ±1 dB in narrow-band levels is
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An underwater system for explosive detection
SPIE Proceedings, 2007Once the presence of the anomaly on the bottom of the shallow coastal sea water is confirmed it is necessary to establish if it contains explosive charge. This could be performed by using neutron sensor installed within an underwater vessel.
Valković, Vladivoj +2 more
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Calculation of powerful underwater explosions
Fluid Dynamics, 1971A finite-difference method of calculating powerful underwater explosions using an artificial viscosity is described. An equation of state valid over a broad range of thermodynamic parameters is used for describing the properties of the water. Relatively weak explosions, where the compressibility of the water can be neglected or taken into account in ...
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An underwater explosive shock gun
Journal of Fluid Mechanics, 1967A theoretical study is made of a simple design for an underwater shock gun, which consists of a chamber in the form of a hollow circular cone, with a spherical sector of explosive charge fitted into the apex. When the explosive is initiated at the apex, the resulting sector of a spherical blast wave will be diffracted by expansion waves moving inwards ...
A. Coombs, C. K. Thornhill
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