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WAVES GENERATED BY A SUBMERGED BODY MOVING IN STRATIFIED FLUIDS AND VERTICAL STRUCTURES OF INTERNAL WAVES

WAVES GENERATED BY A SUBMERGED BODY MOVING IN STRATIFIED FLUIDS AND VERTICAL STRUCTURES OF INTERNAL WAVES

作     者:WEIGang DaiShi-qiang MiaoGuo-ping HuangSi-xun TaoMing-de LiBai-qi LiuYu-lu WangDao-zeng YouYun-xiang 

作者机构:ShanghaiInstituteofAppliedMathematicsandMechanicsShanghaiUniversityShanghai200072China ShanghaiUniversity ShanghaiJiaotongUniversityChairman P.L.A.UniversityofScienceandTechnology FudanUniversity ChinaShipScientificResearchCenter ShanghaiJiaotongUniversity 

出 版 物:《Journal of Hydrodynamics》 (水动力学研究与进展B辑(英文版))

年 卷 期:2004年第16卷第1期

页      面:113-114页

核心收录:

学科分类:080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学(可授工学、理学学位)] 

主  题:stratified fluid internal wave kelvin wave flat solitary wave algebraicsolitary wave conjugate flow green''s function benjamin-ono equation 

摘      要:This dissertation deals with the internal waves generated by a submergedmoving body in stratified fluids by combining theoretical and experimental methods. Our purpose isto provide some scientific evidences for non-acoustic detection of underwater moving bodies based onthe principles of dynamics of the internal waves. An approach to velocity potentials obtained bysuperposing Green s functions of sources and sinks was proposed for Kelvin waves at the free surfaceor interface in a two-layer fluid. The effects of interacting surface- and internal-wave modesinduced by a dipole on the surface divergence field were investigated. A new theoretical modelformulating the interaction of a two-dimensional submerged moving body with the conjugate flow in athree-layer fluid was established. An exact solution satisfying the two-dimensional Benjamin-Onoequation was obtained and the vertically propagating properties of the weakly nonlinear long waveswere studied by means of the ray theory and WKB method. The above theoretical results arequalitatively consistent with those obtained in the experiments conducted by the author.

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