Wall-modeled large-eddy simulation of noise generated by turbulence around an appended axisymmetric body of revolution  

作　　者：Zhi-teng Zhou Zhao-yue Xu Shi-zhao Wang Guo-wei He 

机构地区：[1]LNM,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100149,China

出　　处：《Journal of Hydrodynamics》2022年第4期533-554,共22页水动力学研究与进展B辑（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.11988102,11922214).

摘　　要：The directivity of the noise generated by turbulent flows around an underwater vehicle(the fully appended SUBOFF body)is investigated numerically,where the turbulent flows are simulated by using the large eddy simulation(LES)with a non-equilibrium wall model and the noise is calculated by using the Ffowcs Williams and Hawking formulation.The wall-modeled LES reproduces the features of turbulent flows around SUBOFF,such as the attached boundary layers around the hull,separated vortices from appendages and the wrapped vortices in wakes.The coefficients and power spectral density of the wall pressures obtained are in agreement with the previous numerical results and experimental measurements.It is found that the constructive and destructive interferences of lift and side-force dipoles lead to the deviations of the directivities of instantaneous sound pressures from the lift directions.This is different from noise generated by flows around a circular cylinder,where lift dipoles dominate the radiated noise.

关 键 词：Large eddy simulation(LES) turbulence-generated noise axisymmetric body of revolution SUBOFF 

分 类 号：O327[理学—一般力学与力学基础] O35[理学—力学]