Flow patterns of cross-flow around a varicose cylinder

被引:5
作者
Wang, FH [1 ]
Jiang, GD
Lam, K
机构
[1] Xian Jiaotong Univ, Sch Energy & Power Engn, Xian 710049, Peoples R China
[2] Xian Jiaotong Univ, Sch Mech Engn, Xian 710049, Peoples R China
[3] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China
关键词
varicose cylinder; PIV; LIF; CFD; flow pattern;
D O I
10.1007/BF03181602
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
The near wake of a varicose cylinder has been experimentally investigated using Laser Induced Fluorescence (LIF) and Digital Particle Imaging Velocimetry (DPIV). The work aims to provide understanding to the mechanism of the cross flow around varicose cylinder as well as to comprehend why the introduction of relatively small degrees of spanwise waviness can have a significant effect on drag reduction and suppression of the cylinder vibration. The evolution of the flow patterns and the corresponding vortex interactions are obtained. The experimental results indicated that the wake width and the formation length vary along the span of the varicose cylinder. A wider wake and a longer formation length were observed in the saddle plane. In addition, an interpretation of the three-dimensional wake structures is postulated and conceptually shown. The numerical simulation by 3-D finite volume method is successful in predicting the flow features found by the experiments.
引用
收藏
页码:49 / 56
页数:8
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