CROSS-BISPECTRAL ANALYSIS OF A VIBRATING CYLINDER AND ITS WAKE IN LOW REYNOLDS-NUMBER FLOW

被引：7

作者：

ELGAR, S

VANATTA, CW

GHARIB, M

机构：

[1] Electrical and Computer Engineering, Washington State University Pullman

[2] Department of Applied Mechanics and Engineering Sciences, University of California, La Jolla

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 1990年 / 4卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0889-9746(90)90043-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Cross-bispectral analysis is used to investigate the coupling between a slender vibrating cylinder and the velocity field in its wake at low Reynolds numbers [Re = O(102)]. The velocity field was characterized by a complicated power spectrum, with low frequency peaks as well as upper and lower side band peaks near the primary Strouhal frequency peak and its harmonics. Power spectral and cross-bispectral analyses indicate that the rich structure of the wake velocity power spectra is a direct consequence of the vibrating cylinder. The data suggest the cylinder is coupled to its wake in the sense that the cylinder vibrations introduce motions into the wake at the vibration frequency, and these motions interact nonlinearly within the wake to produce fluctuations at other frequencies. Cross-bispectral analysis isolates the interactions between cylinder vibrations and wake fluctuations. © 1990 Academic Press Limited.

引用

页码：59 / 71

页数：13

共 22 条

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