VORTEX SHEDDING FROM A CIRCULAR-CYLINDER OF FINITE LENGTH PLACED ON A GROUND PLANE

被引：188

作者：

OKAMOTO, S ^{[1
]}

SUNABASHIRI, Y ^{[1
]}

机构：

[1] NISSAN MOTOR CO LTD,TOKYO,JAPAN

来源：

JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME | 1992年 / 114卷 / 04期

关键词：

D O I：

10.1115/1.2910062

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper describes a study of changes in the vortex formation and the turbulent wake from a circular cylinder with a finite aspect ratio, placed on a ground plane. The experiment was carried out in an N.P.L. blow down type wind-tunnel with a working section of 500 mm x 500 mm x 2,000 mm, and between the Reynolds number 2.5 x 10(4) and 4.7 x 10(4). The surface-pressure distributions on the circular cylinder were measured and the drag coefficient was determined from these measurements. Vortices of two kinds generated in the flow-field around the cylinder were observed. The power spectrum, auto-correlation, space-correlation, velocity defects, and turbulent intensities in the turbulent wake behind a circular cylinder were also measured. It was found that the flow pattern changed rapidly above aspect ratio H/D = 4, with vortex shedding changing from symmetric ''arch '' type to antisymmetric ''Karman'' type.

引用

页码：512 / 521

页数：10

共 10 条

[1]

ETZOLD F, 1976, Z FLUGWISSENSCH, V24, P77

[2] TURBULENT UNIFORM-FLOW AROUND CYLINDERS OF FINITE LENGTH [J].