Theoretical Calculation Of The Hydrodynamics Of Underwater Vehicle Near Submarine

When two bodies move in inviscid fluid, interacted force would act on them as the distance between them becomes small. The research in this respect will be of great value to the retrieval of underwater vehicle as well as d ynamic positioning and automatic controlling i n which m ore accurate requirement is expected.In this thesis, according to the theory of potential flow, the mathem-atical model of two bodies moving in inviscid fluid with arbitary 3-dimensional shape is presented and the formula of interacted force between them is derived. Corresponding program is designed based on the theory, and a numerical computation about a sphere near wall is utilized to verify the effectivity of the program. Then satisfactory results are obtained when underwater vehicle g oes toward s ubmarine a long the fixed p aths by numerical computation, and corresponding analysis follows. Finally, for all kinds of movements, the hydrodynamic simulation is carried out. In the way of grid generation, comparison about various generating methods is made. In the end software Gambit is employed to do such work from the point of practicability, and the interface program to translate the grid file is also given. It relieves the people from the similar heavy work of grid generation.The work of this thesis has practical use for the retrieval of underwater vehicle and the prediction of hydrodynamic when it is near seabed or wharf.