Numerical Study of Nearfield Acoustic and Hydrodynamic Pressure Fluctuation
In studying the mechanism of aerodynamic noise generated by flow over a buff body,trying to separate the acoustic pressure fluctuation from the hydrodynamic pressure fluctuation is a very important and difficult problem.In present study,numerical simulation of a square cylinder and a flat plate configuration were performed to exam noise separation methods.The assessments of flow and sound field have been conducted by Computational Fluid Dynamics (CFD) based on finite volume method with SA turbulence model.Wavenumber-frequency spectrum method was used to analyze flow structure and sound fields in near acoustic field from frequency domain,which tried to separate the acoustic pressure fluctuation by the differences between the speed of sound and flow means different angular frequency.And another method which tried to extract the acoustic field from the entire pressure field given by SA turbulence model directly was also proposed.The wavenumber frequency spectrum was also calculated by this method,and the comparison of the two methods was implemented.
Numerical Algorithms Computational Fluid Dynamics Turbulence Modeling Aeroacoustics
Anning CHEN Yasuhiko OKUTSU Koichi MORI
Department of Aerospace Engineering, Nagoya University, Nagoya, 466-8603, Japan; Vehicle Function Testing Dept., Development Engineering Office, Mitsubishi Motors Corporation
国际会议
The 8th International Conference of Computational Fluid Dynamics, (ICCFD8)(第八届国际计算流体力学会议)
成都
英文
1-7
2014-07-25（万方平台首次上网日期，不代表论文的发表时间）