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Numerical Simulation for Flow Noise of Subsurface Buoy Based on LES and FEM/AML Method
Pages: 22-27
Year: Issue:  6
Journal: Journal of Ocean Technology

Keyword:  subsurface buoyflow noiseLESFEM/AML;
Abstract: In order to assess the flow noise of the submarine structure in the marine environment, a numerical simulation research using Large Eddy Simulation(LES) and Finite Element Method/Automatically Matched Layer(FEM/AML) method is conducted on a NACA airfoil model in this paper. The numerical simulation results which represent sound pressure level of characteristic point in frequency domain are in good agreement with the FLUENT data. The fluctuating pressure results and the surface sound of the subsurface buoy have a consistent distribution, which proves the accuracy of the method for predicting the flow noise of underwater structures.According to the research, the flow noise energy of low-medium frequency will concentrate on the rear part of subsurface buoy. The radiation noise of the target body in the sound field is distributed in a petal shape, and the radiation range is large in the middle of the target body, small in the tail part.
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