The Flow and Aerodynamic Noise Calculation of A Generic Side Mirror
The flow and aerodynamic noise of a generic side mirror in high-speed is evaluated using numerical simulation and experiment. The Reynolds number mber is Re5.2105 basing on the mirror diameter. Transient flow field is analyzed by Large Eddy Simulation (LES), two different sub-grid scale (SGS) models named Smagorinsky-Lilly (SL) and Wall-Adapting Local Eddy-viscosity (WALE) are used to express the turbulent viscosity. Detailed velocity vectors and pressure fluctuation contours are compared by cut planes in the flowfield. Mean and transient pressure are also monitored at several points in the flow field and compared with corresponding experimental data. The sound propagation is predicted by the Ffowcs Williams-Hawkings (FW-H) acoustic analogy where wall pressure fluctuations and pressure temporal are treated as two source terms. The conclusion is that the SL model is a better candidate for this mirror simulation.
Aerodynamic Noise Numerical Simulation LES SGS FW-H Acoustic Analogy
Lin Xiaohui Wang Yiping Chen Zhifu Dong Guangping Gu Zhengqi
The State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University Cha Hunan University of Technology Xiangtan, China411300
国际会议
浙江义乌
英文
1278-1283
2010-11-17(万方平台首次上网日期,不代表论文的发表时间)