Frequency effects on lift and drag for flow past an oscillating cylinder

被引：45

作者：

Zheng, Z. C. ^{[1
]}

Zhang, N. ^{[1
]}

机构：

[1] Kansas State Univ, Dept Mech & Nucl Engn, Manhattan, KS 66506 USA

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 2008年 / 24卷 / 03期

关键词：

immersed-boundary method; frequency effects; oscillating cylinder; lift and drag;

D O I：

10.1016/j.jfluidstructs.2007.08.010

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A transversely oscillating cylinder in a uniform flow is modeled to investigate frequency effects of flow-induced wake on lift and drag of the cylinder. Specifically, verified unsteady fluid dynamic simulations using an immersed-boundary method in a fixed Cartesian grid predict the flow structure around the cylinder and reveal how the integration of surface pressure and shear distributions provides lift and drag on the oscillating cylinder. In this study, frequency ranges to be considered are both near and away from the natural frequency of wake vortex shedding. Subsequently, the effects of frequency lock-in, superposition and demultiplication on lift and drag are discussed based on the spectral analysis of time histories of lift and drag. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：382 / 399

页数：18

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