Numerical investigation on the interaction between internal solitary wave and self-propelled submersible
Numerical investigation on the interaction between internal solitary wave and self-propelled submersible
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DOI：
10.1063/5.0169436
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发表时间：
2023-10
影响因子：
4.6
通讯作者：
Junrong Wang;Zhenyang He;Botao Xie;Zhuang Chen;Wenbin Wu
中科院分区：
文献类型：
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作者：
Junrong Wang;Zhenyang He;Botao Xie;Zhuang Chen;Wenbin Wu
内孤立波经常严重威胁潜水器的生存能力。现有的大多数研究都集中在isw与固定或悬浮式潜水器之间的相互作用上。然而，对isw与自航潜水器相互作用的研究仍然很少，这是海洋工程中较为现实的案例。本文建立了ISW与自行式潜水器相互作用的三维数值模型。基于扩展的Korteweg-de Vries （eKdV）理论，通过求解Navier-Stokes （N-S）方程，在两层流体数值波槽中生成了ISW。通过将ISW环境提供的水动力载荷引入到潜水器的标准运行方程中，可以得到潜水器的6个自由度运动。采用动态overset网格技术对自航潜水器在ISW流场中的运动进行仿真。通过与水下圆柱体ISW环境下的实验对比，验证了该数值模型的正确性。利用该数值模型，比较了固定、悬挂和自航潜水器在ISW中的相互作用效应，并讨论了自航潜水器推进力对ISW结构相互作用效应的影响。数值计算结果表明，潜水器的载荷和运动在浪涌、升沉和俯仰方向上发生了显著变化。特别是高推进力的潜水器可以穿透波面，达到较大的俯仰角，幅度可达36°，这进一步导致初始推进方向运动速度降低35%。
Internal solitary waves (ISWs) often seriously threaten the survivability of the underwater submersible. Most of the existing investigations focus on the interaction between ISWs and fixed or suspended submersibles. However, the investigation on the interaction between ISWs and self-propelled submersibles is still scarce, which is a more realistic case in the marine engineering. In this paper, a three-dimensional numerical model for the interaction between ISW and self-propelled submersible is developed. Based on the extended Korteweg–de Vries (eKdV) theory, the ISW is generated in a two-layer fluid numerical wave tank by solving the Navier–Stokes (N–S) equation. By introducing the hydrodynamic loadings provided by the ISW environment into the standard operation equation of the submersible, the six degrees-of-freedom motions of the submersible can be obtained. The dynamic overset mesh technology is adopted to simulate the motions of the self-propelled submersible in the ISW fluid field. The present numerical model is validated by comparing with the experiment on a submerged cylinder in the ISW environment. Using this numerical model, we compare the interaction effects of the fixed, suspended, or the self-propelled submersible in ISW and discuss the influences of propulsive forces of the self-propelled submersible on ISW–structure interaction effects. The numerical results show that the loadings and movements of the submersible change remarkably in the surge, heave, and pitch direction. Especially, the submersible with high propulsive forces can pierce the wave surface and reach a large pitch angle with the amplitude of 36°, which further results in a 35% motion speed decrease in the initial propulsion direction.