内孤立波会导致海水等密度面大振幅的垂向起伏，影响潜水器的水下适航性，甚至危及安全性。运用CFD方法开展内孤立波数值造波，并将内孤立波数值解与eKdV理论解进行比较，验证数值造波的准确性。在此基础上，模拟了内孤立波作用下处于3种不同潜深的Suboff缩比模型的运动，详细分析了不同潜深下模型在内孤立波作用下的运动响应规律。结果表明：内孤立波作用下模型运动响应明显，模型处于分层交界面时，模型随内孤立波波面起伏，呈“随波逐流”状态，内孤立波的波幅和波倾角决定了模型的垂荡值和纵摇角；模型处于分层交界面上方或下方时，受内孤立波流场水动力作用，模型也产生了明显的垂荡、纵荡和纵摇；潜深位置不同时，模型的运运轨迹也有明显差异。
The internalsolitary wave will lead to the vertical fluctuation of large amplitude on the isodensity surface of seawater,which will affect the seaworthiness of submersible, and even endanger the safety. In this paper, the numerical wave generation of internal solitary wave is carried out by using CFD method, and the accuracy of numerical wave-making is verified by comparingthe numerical solution with the theoretical solution of eKdV. On this basis, the motion of three kinds of suboff scaled models with different submersible depths under internal solitary wave is simulated, and the motion response of submersible with different submersible depths under internal solitary wave is analyzed in detail. The results show that the motion response of the model under the internal solitary wave is obvious. When the model is at the interface of stratification, the model fluctuates with the surface of the internal solitary wave, and the amplitude and inclination of internal solitary wave determine the heave and pitch of the model. When the model is above or below the interface of stratification, the model also has obvious heave, surge and pitch under the hydrodynamic action of internal solitary wave flow field. The trajectory of the model is obviously different when the depth is different.
2022,44(4): 47-53 收稿日期：2021-09-13
DOI：10.3404/j.issn.1672-7649.2022.04.011
分类号：U661.1
基金项目：国家自然科学基金资助项目（51779232）
作者简介：刘乐(1990-)，男，硕士，工程师，研究方向为深海装备水动力学
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