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周期性扰动对湍流边界层层次结构的影响
引用本文:程雪玲,胡非.周期性扰动对湍流边界层层次结构的影响[J].北京大学学报(自然科学版),2005,41(5):688-694.
作者姓名:程雪玲  胡非
作者单位:中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029;北京大学力学与工程科学系,湍流与复杂系统研究国家重点实验室,北京,100871
基金项目:国家自然科学基金,国家自然科学基金
摘    要:在开口式循环水槽底部湍流边界层外区中引入周期性扰动,对湍流场的速度脉动时间序列信号进行了统计分析,研究了湍流边界层中周期性人工扰动对湍流结构的影响,结果表明高频扰动的湍流中She-Leveque(简称SL)湍流层次相似律成立。

关 键 词:周期性扰动  湍流  标度律  层次结构  
收稿时间:2004-04-09
修稿时间:2004-04-092004-06-03

The Effect of Periodic Disturbance to the Hierarchical Structure in Turbulent Boundary Layer
Cheng XueLing;Hu Fei.The Effect of Periodic Disturbance to the Hierarchical Structure in Turbulent Boundary Layer[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2005,41(5):688-694.
Authors:Cheng XueLing;Hu Fei
Institution:State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, 100029; State Key Laboratory for Turbulence and Complex System, Department of Mechanical and Engineering Science, Peking University, Beijing, 100871
Abstract:Artificial periodic disturbances are introduced to the outer field of turbulent boundary layer in an closed-circuit open water channel. Statistical method is employed for analyzing the velocity-fluctuation-timeseries. The effect of the disturbance to turbulent structure in boundary layer is studied. The result indicates the She-Leveque hierarchical similarity exists among high frequency turbulence.
Keywords:periodic vibration  turbulence  scaling law  hierarchical structure
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