Effect of Rake and Skew on the Hydrodynamic Characteristics and Noise Level of the Marine Propeller

摘要

The research performed in this paper is conducted to predict the hydro-acoustics of the ship propeller by Reynolds-averaged Navier-Stokes solver in various skew and rake angles. Those angles may cause changes in pressure fluctuations and have effect on the propeller noise level. The two-step Ffowcs Williams and Hawkings equations are used to calculate hydrodynamic pressure and its performance as well as sound pressure level (SPL) at various points around the propeller. Comparison of the numerical results shows good agreement with the previous works. Based on these results, propellers skew and rake angles have effect on the noise sources. Many results for the pressure distribution, hydrodynamic performance and SPL at different rake and skew angles are presented and discussed.