内孤立波中潜水器纵向运动特性数值仿真研究  

Numerical simulation of longitudinal motion property of submersibles under internal solitary waves

作　　者：刘乐 姚志崇 冯康佳 胡芳琳[1,2] LIU Le;YAO Zhi-chong;FENG Kang-jia;HU Fang-lin(China Ship Scientific Research Center,Wuxi 214082,China;Taihu Laboratory of Deepsea Technological Science,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]深海技术科学太湖实验室,江苏无锡214082

出　　处：《船舶力学》2024年第11期1633-1642,共10页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(51779232)。

摘　　要：海洋中内孤立波会诱发突变的环状剪切流,导致潜水器产生大幅度的垂向掉深和俯仰运动,给潜水器航行安全和作业性能带来威胁。本文基于CFD的速度入口造波法和重叠网格技术,建立内孤立波中潜水器运动响应预报方法,通过与分层流水池试验结果对比,证明该方法可准确模拟内孤立波中潜水器大振幅运动;通过对处于分层界面的无动力悬浮潜水器在内孤立波中的运动过程模拟分析,揭示内孤立波中潜水器掉深及俯仰运动产生机理,同时探究分层厚度比、波幅、潜深等参数对无动力悬浮潜水器纵向运动的影响规律。结果表明:潜水器在内孤立波中的掉深和俯仰运动幅值是由内孤立波波幅和最大波倾角决定;波幅、分层厚度比、潜深等因素对潜水器纵向运动特性有较大影响。Abrupt annular shear flows induced by internal solitary waves will cause submersibles to produce a large depth drop and pitch motion,threatening the safety and operation performance of submersibles.Based on the velocity inlet wave generation method and overset grid technique of CFD,the motion response predic⁃tion method of submersibles in internal solitary wave was established.With the prediction results compared with the experimental results,it is proved that the method can accurately simulate the large amplitude motion of submersibles in internal solitary waves.Through the simulation analysis of motion process of unpowered floating submersibles at the stratified interface under the action of internal solitary waves,the mechanism of depth drop and pitch motion of submersibles in internal solitary waves was revealed,and the effects of strati⁃fied thickness ratio,wave amplitude and depth of navigation on the longitudinal motion of unpowered floating submersibles were investigated.The results show that the amplitude of depth drop and pitch of the submers⁃ibles in internal solitary waves were determined by the wave amplitude and the maximum slope of wave sur⁃face;The factors such as amplitude,stratified thickness ratio and depth of navigation have great influence on the longitudinal motion property of submersibles.

关 键 词：内孤立波 纵向运动 掉深 俯仰 波倾角 

分 类 号：U661.1[交通运输工程—船舶及航道工程]