The hydrodynamic ram pressure generated by spherical projectiles
The hydrodynamic ram pressure generated by spherical projectiles
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DOI：
10.1016/j.ijimpeng.2008.12.009
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发表时间：
2009-06-01
影响因子：
5.1
通讯作者：
Toy, Norman
中科院分区：
文献类型：
--
作者：
Disimile, Peter J.;Swanson, Luke A.;Toy, Norman
对单次水动力撞击事件产生的压力进行了实验研究。制造了一个通用的箱式油箱模拟器来研究这种现象，它能够容纳3785.41升的液体，从而将事件的各个阶段与油箱壁反射隔离开来，并能够分离出各个阶段的影响。钨、钢和铝球形射弹被发射到坦克中，结果使用高速压力传感器测量，这些传感器位于整个坦克中，并与坦克模拟器内记录的压力波和事件进行比较。它被确定为一个高压的初始波产生的影响，其次是更渐进的阻力压力周围的弹丸。沿着研究了初始波的角分布及其随距离的变化规律，以及弹丸质量对阻力压力的影响。这一区域的压力在抛射体尾流中降低，形成一个尾部空腔，该空腔保持在低压下，直到空腔开始塌陷。这导致模拟器内记录的最大压力。(C)2008爱思唯尔有限公司保留所有权利。
An experimental study was made of the pressures generated by a single hydrodynamic ram event. A generic box type fuel tank simulator was fabricated to study the phenomenon and was capable of containing 3785.41 of liquid thereby isolating the phases of the event from tank wall reflections, and enable separation of the effects of each phase. Tungsten, steel, and aluminum spherical projectiles were fired into the tank and the result was measured using high-speed pressure transducers, which were located throughout the tank, and compared to the pressure waves and events recorded inside the tank simulator with a high-speed video. It was determined that a high-pressure initial wave is generated at impact and is followed by the more gradual drag pressure around the projectile. The angular distribution of the initial wave and the variation with distance were investigated along with the effect of projectile mass on the drag pressure. This region of pressure decreases in the projectile wake, forming a trailing cavity that remains at a low pressure until the cavity begins to collapse. This results in the largest recorded pressure inside the simulator. (C) 2008 Elsevier Ltd. All rights reserved.