Numerical Prediction of Marine Propeller Noise in Non-Uniform Inflow--《China Oce

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Numerical Prediction of Marine Propeller Noise in Non-Uniform Inflow水利论文%d)[u2J1\?R#Ky2y/w

jrY7hI%r1km4}0潘雨村 张怀新

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n)W9_%]Y d\0【摘要】: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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tD!v@S(s-\,T }-m^0hydroacoustics;Detached Eddy Simulation(DES);Ffowcs Williams-Hawkings(FW-H) equation;marine propeller;non-uniform inflow水利论文'G7h;{V;?+O?2Z

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【基金】:supported by the National Natural Science Foundation of China (Grant No. 11272213)

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【分类号】:U664.33;TB533.1水利论文.RGZ3Qc*s^

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rMpT+q.?}01. IntroductionMarine propeller noise is a main component of noise generated by surface and underwatervehicles, which is of critical importance for underwater detection. Noise generated by propeller can begenerally classified into cavitating noise and no水利论文}8s.y5| `.e8l

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