سال انتشار: ۱۳۹۱

محل انتشار: دومین کنفرانس بین المللی آکوستیک و ارتعاشات

تعداد صفحات: ۹

نویسنده(ها):

Mohammadreza Bagheri – Mechanical Engineering Department, Sharif University of Thechnology, Tehran,Iran
Mohammad said seif –
Hamid Mahdigholi –
Mohsen Rostami –

چکیده:

Noise reduction and control is an important problem in the performance of underwater acoustic systems and in the habitability of the passenger ship for crew and passenger. Furthermore, soundgenerated by a propeller is critical in underwater detection and it is often related to the survivability of the vessel. This paper presents a numerical study on noises of the underwater propeller for different performance conditions. The non-cavitating and blade sheet cavitation noise generated byan underwater propeller is analyzed numerically in this study. The noise is predicted using timedomainacoustic analogy. The flow field is analyzed with finite volume method (FVM), and then the time-dependent flow field data are used as the input for Ffowcs Williams–Hawkings formulation topredict the far-field acoustics. Noise characteristics are presented according to noise sources andconditions. Through this study, the dominant noise source of the underwater propeller is analyzed. The developed flow solver is applied to the model propeller in uniform inflow. Computed results are shown to be in good agreement with other numerical results. The overall results suggest that thepresent approach is a practicable tool for predicting cavitation and non-cavitation noise of propellers in far field