Identification of turbulent coherent structures based on wavelet and bi-spectrum analysis

被引：0
|
作者：
Zhang, Bin [1 ]
Wang, Tong [1 ]
Gu, Chuan'gang [1 ]
Dai, Zhengyuan [2 ]
机构：
[1] Key Laboratory for Power Machinery and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
[2] Trane's Asia-Pacific Research Center, Shanghai 200001, China
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | 2009年 / 40卷 / 11期
关键词：
Wavelet analysis - Wavelet transforms;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
It is very important to develop a more effective and objective method to get more quantified information of coherent structures from the turbulent signal. Based on wavelet and bi-spectrum analysis, a reasonable method was put forward. The large eddy signal including the information of coherent structures was extracted by the bi-spectrum and cross correlation analysis, and multi-scale coherent structures were detected by the wavelet transform. Besides, by using wavelet analysis, a new identification criterion of energy-containing scale was established. The reliability and rationality of the method was verified by an example with the sample data from the experiment on the mechanism of rib-lets drag reduction. Furthermore, this research has also led to the conclusion that the multi-scale characteristics of coherent structures can be gotten by the above method.
引用
收藏
页码：203 / 207
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