| Investigation of Wall Pressure Fluctuations in a Turbulent Boundary Layer by Large Eddy Simulation |
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| 作者姓名： | 潘雨村 张怀新 |
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| 作者单位： | School of Naval Architecture Ocean and Civil Eng. Shanghai Jiaotong Univ.，School of Naval Architecture Ocean and Civil Eng. Shanghai Jiaotong Univ.，Shanghai 200240 China，Dept. of Naval Architecture and Ocean Eng. Naval Univ. of Eng. Wuhan 430033 China，Shanghai 200240 China |
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| 摘 要： | Large eddy simulation (LES) was used to investigate the space-time field of the low Mach number, fully developed turbulent boundary layer on a smooth, rigid flat plate. The wall-pressure field simulated by LES was analyzed to obtain the pressure statistics, including the wall-pressure root-mean square, skewness and flatness factors, which show the wall pressure distribution was not Gaussian. The profile of the auto-power spectral density and the contour of the streamwise wavenumber-frequency spectral density of wall-pressure were plotted. The "convection ridge" can be observed clearly and the convection velocity can be calculated from the location of the convection peak.
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Investigation of Wall Pressure Fluctuations in a Turbulent Boundary Layer by Large Eddy Simulation |
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| PAN Yu-cun,ZHANG Huai-xin,.Investigation of Wall Pressure Fluctuations in a Turbulent Boundary Layer by Large Eddy Simulation[J].Journal of Shanghai Jiaotong university,2007,12(6):817-823. |
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| Authors: | PAN Yu-cun ZHANG Huai-xin |
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| Abstract: | Large eddy simulation (LES) was used to investigate the space-time field of the low Mach number, fully developed turbulent boundary layer on a smooth, rigid flat plate. The wall-pressure field simulated by LES was analyzed to obtain the pressure statistics, including the wall-pressure root-mean square, skewness and flatness factors, which show the wall pressure distribution was not Gaussian. The profile of the auto-power spectral density and the contour of the streamwise wavenumber-frequency spectral density of wall-pressure were plotted. The "convection ridge" can be observed clearly and the convection velocity can be calculated from the location of the convection peak. |
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| Keywords: | turbulent boundary layer wall pressure fluctuations large eddy simulation (LES) wavenumber-frequency spectral convection velocity |
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