摘要
海洋中内波频发,携带巨大能量,对水下航行体的安全航行有巨大威胁。基于非静压海洋环流模型MITgcm,在连续密度分层环境场下,模拟内波生成传播的全过程。并通过自定义边界条件,在STAR-CCM+中实现连续内波波列的重现。在小范围数值水槽中,基于RANS方法,对水下航行体约束状态下遭遇实际环境场中内波波列时的水动力载荷进行研究。分析表明,该情况下水动力载荷前后变化规律类似,水平力、俯仰力矩变化幅值相差不大,垂向力相差接近两倍。并对不同潜深工况下水下航行体遭遇内孤立波进行研究,结果表明,载荷变化规律取决于水下航行体相对于密度跃层的位置。
Internal solitary waves(ISWs)appear frequently in ocean,which carries huge energy and are serious threats to the safe navigation of submersible.Firstly,simulating the entire generation and propagation process of internal wave in a continuous density stratified environmental field by using the non hydrostatic ocean circulation model MITgcm.And by defining boundary conditions,accurate simulation of the internal solitary wave packet generated in the MITgcm model is achieved in STAR CCM+.In a small-scale numerical water tank,the RANS method was used to numerically simulate the hydrodynamic load of submersible under constrained conditions when encountering internal solitary wave packet.Results show that in this situation the change pattern of hydrodynamic load before and after is similar,with little difference in the amplitude of horizontal force and pitch moment changes,and nearly twice the difference in vertical force.And research was conducted on submersible encountering internal solitary waves under different depths,and the results showed that the load variation law depends on the position of the submersible relative to the density jump layer.
作者
魏佳铭
张华
张超
WEI Jiaming;ZHANG Hua;ZHANG Chao(China Ship Scientific Research Center,Wuxi 214082,China;National Key Laboratory of Science and Technology on Hydrodynamics,Wuxi 214082,China)
出处
《舰船科学技术》
北大核心
2025年第16期76-82,共7页
Ship Science and Technology
关键词
连续密度分层
MITgcm
水下航行体
内波波列
水动力
density continuous stratification
MITgcm
submersible
Internal solitary wave packet
hydrodynamic
