Numerical investigation of cavitating flow induced noise around a marine propeller
The objective of this paper is to numerically investigate the cavitating flow around a marine propeller and to explore the intrinsic relationships between the sheet cavitation and its radiation noise.The k-ω SST turbulence model with the turbulence viscosity correction and the Zwart cavitation model are introduced to the simulation of cavitating flow around a propeller in a non-uniform wake.Reasonable agreement can be obtained between theexperimental and numerical results of the sheet cavitating flow around the propeller.Based on the theory of acoustic analogy, the hybrid method in the frequency domain is used for the prediction of loading noise, and a time domain method based on the theory of spherical bubble acoustic radiation is adopted to predict the bubble noise.The results show that, the acoustic energy of propeller loading noise is concentrated at low frequency and mainly subjected to linear spectrum property,exhibiting a distinct dipole characteristics at its low-order blade passage frequency.In the sheet cavitation stage, the bubble noise becomes the main source of the noise, whose acoustic energy is concentrated at low frequency and the radiation spectrum is with broadband characteristics.The maximum sound pressure level occurs at the first order of blade passage frequency with a complex distribution.The radiation noise spectrum of both loading noise and bubble noise can illustrate the relationship between the geometric feature of the propeller and the operating conditions, which may build some foundation for the propeller noise reduction measurements and the optimal design of high-performance propellers.
Cavitating flow Cavitation noise Numerical simulation Marine propeller
WU Qin HUANG Biao ZHU Ming-ming CAO Shuliang WANG Guo-yu
Department of Thermal Engineering, Tsinghua University, Beijing, 100084, China Beijing Institute of Technology, Beijing, 100081, China
国内会议
长春
英文
350-356
2017-08-08（万方平台首次上网日期，不代表论文的发表时间）