Transverse galloping at low Reynolds numbers

被引：70

作者：

Barrero-Gil, A. ^{[1
]}

Sanz-Andres, A. ^{[1
]}

Roura, M. ^{[1
]}

机构：

[1] Univ Politecn Madrid, ETSI Aeronaut, Inst Univ Ignacio Da Riva, E-28040 Madrid, Spain

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 2009年 / 25卷 / 07期

关键词：

Transverse galloping; Laminar flow; Square cylinder; RECTANGULAR CYLINDERS; SQUARE CYLINDER; FLOW; INSTABILITIES; WAKE;

D O I：

10.1016/j.jfluidstructs.2009.07.001

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The possibility of transverse galloping of a square cylinder at low Reynolds numbers (Re <= 200, so that the flow is presumably laminar) is analysed. Transverse galloping is here considered as a one-degree-of-freedom oscillator subjected to fluid forces, which are described by using the quasi-steady hypothesis (time-averaged data are extracted from previous numerical simulations). Approximate solutions are obtained by means of the method of Krylov-Bogoliubov, with two major conclusions: (i) a square cylinder cannot gallop below a Reynolds number of 159 and (ii) in the range 159 <= Re <= 200 the response exhibits no hysteresis. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1236 / 1242

页数：7

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