Numerical Investigation of Vortex Noise of Non-Cavitation Propeller in Non-Uniform Ship's Wake

作者：Yao Huilan; Zhang Huaixin

来源：Ship Building of China, 2018, 59(3): 13-22.

• Detached eddy simulations
• Ffowcs Williams-Hawkings equation
• Frequency characteristic
• FW-H equation
• Numerical investigations
• Propeller noise
• Shedding vortex
• Vortex shedding frequency

Detached eddy simulation method was applied to simulate the eddy current field of a propeller. A structural mesh generation method was proposed to generate high quality meshes in the boundary layer of the blades. Q-criterion and user-defined function was used to investigate shedding vortex of the blade and its frequency characteristic. Propeller noise was predicted by solving the Ffowcs Williams-Hawkings equations in which fluctuating pressure on the blade surface was treated as a source term. Spectrum analysis shows that low-frequency discrete line spectrum and high-frequency vortex noise of the propeller are well predicted. It is shown that vortex noise is a type of single tune with frequency same as the vortex shedding frequency and sound pressure level (SPL) 15 dB greater than that of the broadband noise by the fluctuating pressure.

• 出版日期2018
• 单位上海交通大学