Comparison of the hydrodynamic ram caused by one and two projectiles impacting water-filled containers

Comparison of the hydrodynamic ram caused by one and two projectiles impacting water-filled containers
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一颗和两颗弹丸撞击充水容器引起的水动力撞击的比较

DOI:
10.1016/j.ijimpeng.2019.103467
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发表时间:
2019-04
影响因子:
5.1
通讯作者:
Anran Chen
Anran Chen
中科院分区:
工程技术2区
文献类型:
--
作者:
Yangziyi Ji;Xiangdong Li;Lanwei Zhou;Xiaoying Lan;Anran Chen

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充液容器的高速撞击是一个与飞机油箱因流体动力冲压(HRAM)而易受损坏有关的问题。本研究比较了一个和两个球形射弹冲击充水容器使用先前开发和验证的数值模型所造成的水动力冲压。进行了两种类型的比较,以研究水内的压力分布和能量的时间历程的不同的各个部分,分别。双射弹情况下的叠加激波的传播速度高于单射弹情况下的激波。入口板的能量变化不受射弹数量的影响,而与单射弹情况相比,在双射弹情况下更多的来自水的能量被转移到出口板。
High-velocity impact on fluid-filled containers is a concern associated with the vulnerability of aircraft fuel tanks due to hydrodynamic ram (HRAM). The present study compared the hydrodynamic ram caused by one and two spherical projectiles impacting water-filled containers using a previously developed and validated numerical model. Two types of comparisons were conducted to study the difference in pressure distribution inside the water and energy-time history of various parts, respectively. The propagation velocity of the superimposed shock wave in the two-projectile cases is higher than the shock wave in the one-projectile cases. The change in the energy of the entry plate is not affected by the number of projectiles, while more of the energy from water is transferred to the exit plate in the two-projectile cases compared to the one-projectile cases.
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