Numerical Investigation of the Effect of Current on Wave Focusing |
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| Authors: | PAN Yu-cun and LIU Dian-yong |
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| Institution: | State Key Laboratory of Ocean Engineering, Shanghai JiaoTong University; Department of Naval Architecture, Naval University of Engineering;Key State Laboratory of Coastal and Offshore Engineering, Dalian University of Technology |
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| Abstract: | A numerical study on the acoustic radiation of a propeller interacting with non-uniform inflow has been conducted. Real geometry of a marine propeller DTMB 4118 is used in the calculation, and sliding mesh technique is adopted to deal with the rotational motion of the propeller. The performance of the DES (Detached Eddy Simulation) approach at capturing the unsteady forces and moments on the propeller is compared with experiment. Far-field sound radiation is predicted by the formation 1A developed by Farassat, an integral solution of FW-H (Ffowcs Williams-Hawkings) equation in time domain. The sound pressure and directivity patterns of the propeller operating in two specific velocity distributions are discussed. |
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| Keywords: | hydroacoustics Detached Eddy Simulation (DES) Ffowcs Williams-Hawkings (FW-H) equation marine propeller non-uniform inflow |
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