Numerical Study of Cavitation in the Wake of a Hypervelocity Underwater Projectile
Numerical Study of Cavitation in the Wake of a Hypervelocity Underwater Projectile
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DOI：
10.2514/2.5473
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发表时间：
1999-07
影响因子：
1.9
通讯作者：
R. Saurel;Pierre Cocchi;P. B. Butler
中科院分区：
文献类型：
--
作者：
R. Saurel;Pierre Cocchi;P. B. Butler
本研究的重点是在高速水下射弹尾流中的空化。根据两相混合物的性质，提出了一种基于欧拉方程的物理模型。数学封闭是通过提供可能的热力学状态的状态方程来实现的：可压缩液体，可压缩两相混合物，和可压缩纯蒸汽。所提出的模型是解决使用开发的混合计算方案，以准确地解决跨不连续性的属性类型问题。该模型与几个一维的测试用例，已知的解析解进行了验证。为模拟超高速水下射弹，该模型计算非定常冲击波的发展以及射弹尾流空泡区。然后，该模型被用来进行参数化研究的影响，流和弹丸性能的空化。
The focus of this study is on cavitation in the wake of a high-velocity underwater projectile. A physical model based on the Euler equations is presented in terms of two-phase mixture properties. Mathematical closure is achieved by providing equations of state for the possible thermodynamic states: compressible liquid, compressible two-phasemixture,andcompressiblepurevapor.Fortheoperatingconditionsstudiedhere,allstatesaresubcritical. Theproposedmodelissolvedusingahybridcomputationalschemedevelopedtoaccuratelyresolvepropertyproe les across discontinuities. The model is validated with several one-dimensional test cases that have known analytic solutions. For modeling the hypervelocity underwater projectile, the model is shown to compute unsteady shockwave development as well as the projectile-wake cavitation zone. The model is then used to conduct a parametric study on the affect of e ow and projectile properties on cavitation.