GALLOPING OF RECTANGULAR CYLINDERS IN THE PRESENCE OF A SPLITTER PLATE

被引：37

作者：

NAKAMURA, Y

HIRATA, K

URABE, T

机构：

[1] Research Institute for Applied Mechanics, 816, Kyushu UniversityKasuga

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 1991年 / 5卷 / 05期

关键词：

D O I：

10.1016/S0889-9746(05)80004-0

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Galloping of rectangular cylinders with and without a splitter plate is investigated experimentally in low-speed wind tunnels. Particular emphasis is placed on galloping of rectangular cylinders with a splitter plate. The paper is concerned with free- and forced-oscillation experiments. The free-oscillation experiment includes measurements of the growth rate of oscillation in galloping of rectangular cylinders with d/h = 0·2 to 6·0, where d is the depth (streamwise cross-sectional dimension) and h is the height (cross-flow dimension). The forced-oscillation experiment includes measurements of the mean and fluctuating side-face pressures on rectangular cylinders with d/h = 0·6, 1·0 and 2·0, along with flow visualization using smoke. The free-oscillation experiment shows that rectangular cylinders with a splitter plate with d/h up to 5·0 are susceptible to galloping and that galloping vanishes at a value of d/h between 5·0 and 6·0. An interpretation of the mechanism of galloping of rectangular cylinders with a splitter plate is proposed on the basis of the experimental findings obtained. Close similarity between low-speed galloping of rectangular cylinders with and without a splitter plate is mentioned. The paper also discusses the vortex excitation caused by the impinging-shear-layer instability and the vanishing circulation lag in the low-speed range. © 1991 Academic Press Limited.

引用

页码：521 / 549

页数：29

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