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《ACTA MECHANICA SINICA》 1995-04
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THE DIGITAL FILTER METHOD OF EXTRACTING THE COHERENT STRUCTUREIN WALL TURBULENCE

Wang Jiansheng;Zhang Jinzhong;Shu Wei(Department of Mechanics,Tianjin University,Tianjin 300072,China)  
The data obtained from the turbulent boundary layer on a flat plate using 3-component hot wire probe are analysed.A method is proposed,which used a digital fiiter to decompose turbulent signal into two parts.One is small scale eddies that is nearly isotropic,the other is large scale eddies that is anisotropic.Then,the conditional sampling is used to extract the coherent structure.
【Fund】: 国家自然科学基金
【CateGory Index】: O357
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