New research methods of coherent structure based on wavelet analysis

被引：0
|
作者：
Liu, HF [1 ]
Fang, DW [1 ]
Zhou, WX [1 ]
Yu, ZH [1 ]
机构：
[1] E China Univ Sci & Technol, Shanghai 200237, Peoples R China
来源：
HYDROGEN ENERGY PROGRESS XIII, VOLS 1 AND 2, PROCEEDINGS | 2000年
关键词：
wavelet analysis; flow structure; coherent structure; jet flow;
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A new energy maxima criterion, which can clearly distinguish fundamental wave and subharmonic with Morlet wavelet, has been presented. A new formula, which can be used to not only truly reconstruct the wave shape and amplitude of coherent structure, but also eliminate the disturbance of high frequency signal, has been presented utilizing the peculiarities of Morlet wavelet and orthonormal wavelet. At the same time, an average algorithm to compute structure exponent using Mexican hat wavelet has been presented. The results of applying these methods to the study of fluctuation velocity of round jet flow illustrate that these methods can be used to investigate turbulence.
引用
收藏
页码：1347 / 1352
页数：6
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