Abstract
When a high-velocity projectile penetrates a liquid-filled container, the projectile transmits its energy to the liquid through different ways; thus, different types of pressure waves can be generated in the liquid. In this study, an analytical model was established to calculate the drag pressure caused by two projectiles penetrating a liquid-filled container. The potential flow theory was used to calculate the pressure wave generated by the projectiles. The cavity was regarded as a wave-barrier and a pressure-release interface to include its influence on the pressure distribution. First, two types of experimental results were used to verify the analytical model. The analytical results were then compared with the results obtained by an experimentally verified numerical model to verify the proposed partition method. The influence of impact time interval on the pressure and specific impulse was also investigated. It was found that due to the shielding of the cavity on the pressure wave, the pressure and impulse at some specific regions were not affected by the impact time interval between two projectiles.
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