DTIC ADA123274: Comparison of Hull Hydrocode Computations pdf

DTIC ADA123274: Comparison of Hull Hydrocode Computations

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The HULL hydrocode was used to make two-dimensional calculations (for the three-dimensional axisymmetric problem) of a rapidly-decaying shock wave striking a finite right-circular cylinder whose axis was coincident with that of a cylindrical shock tube. Calculations were made for three peak shock over- pressures for 20 percent blockage and for a free-field encounter. These results were then compared with previously reported HULL computations for comparable overpressure step shocks for the same configuration. The net axial loading for these rapidly-decaying shocks behaved quite differently from that for the step shocks. It became negative early in the drag phase for the shock/target encounter in the free field, and oscillated about a net negative value in the drag phase. Net impulse showed a corresponding decrease (from a peak after the end of the diffraction phase) for the decaying shocks. Net impulse increased monotonically for the step shocks

• Creator/s: Defense Technical Information Center
• Date: 12/1/1982
• Year: 1982
• Book Topics/Themes: DTIC Archive, Wortman, John D, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD, *BLOCKING, *HYDRODYNAMIC CODES, *OVERPRESSURE, *SHOCK TUBES, BLAST, BLAST LOADS, COMPUTATIONS, COMPUTERIZED SIMULATION, DYNAMIC PRESSURE, SHOCK WAVES, SIMULATORS, THREE DIMENSIONAL FLOW, TWO DIMENSIONAL FLOW

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