ISSN:
1089-7666
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
Flows following the underwater detonation of pentolite cylinders at the center of one end are calculated to times when the distances of the main shock from the center are about 15 times the radius of a sphere of the same mass. Length to diameter (L/D) ratios of 1, 2, 4, and 7 are treated. An axisymmetric Lagrangian artificial viscosity scheme is used with lateral rezoning to tracks that radiate outward from the gas–water boundary. The usable energy in the water, the internal plus the kinetic energies minus the energy dissipated by shock heating, is obtained both as a function of the angle with the charge axis and the distance from the center. The usable energy is found to be generally decreasing with increasing L/D, greatest off the detonator end of the charge, and lowest off the nondetonator end, where there is the most energy dissipation. Off the side of the charge, the peak shock pressure increases with increasing L/D and 45% to 55% of the usable energy is concentrated near the shock front. Along the charge axis the pressure waves in the water become flatter, with more of the usable energy near the gas–water boundary, as the L/D ratio increases.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.866326
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