| STUDY OF VORTEX CHARACTERISTICS OF THE FLOW AROUND A HORIZONTAL CIRCULAR CYLINDER AT VARIOUS GAP-RATIOS IN THE CROSS-FLOW |
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| 作者姓名： | QI E-rong LI Guo-ya LI Wei WU Jian ZHANG Xin |
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| 作者单位： | QI E-rong State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan 430072，China，LI Guo-ya China Three Gorges Project Corporation，Yichang 443002，China LI Wei，WU Jian State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan 430072，China ZHANG Xin Central South Building Design Institute，Wuhan 430071，China |
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| 摘 要： | 1. INTRODUCTION The flow around a horizontal circular cylinder near a plane boundary (fixed wall) is of great significance in Hydrodynamics. For instance, sewagepipelines in water body of rivers in environmental engineering, conveying pipelines and optica…
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| 关 键 词： | PIV 循环柱面 旋涡结构 Strouhal数 |
| 收稿时间： | 2005-03-28 |
STUDY OF VORTEX CHARACTERISTICS OF THE FLOW AROUND A HORIZONTAL CIRCULAR CYLINDER AT VARIOUS GAP-RATIOS IN THE CROSS-FLOW |
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| QI E-rong LI Guo-ya LI Wei WU Jian ZHANG Xin.STUDY OF VORTEX CHARACTERISTICS OF THE FLOW AROUND A HORIZONTAL CIRCULAR CYLINDER AT VARIOUS GAP-RATIOS IN THE CROSS-FLOW[J].Journal of Hydrodynamics,2006,18(3):334-340. |
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| Authors: | QI E-rong LI Guo-ya LI Wei WU Jian ZHANG Xin |
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| Affiliation: | 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. China Three Gorges Project Corporation, Yichang 443002, China;3. Central South Building Design Institute, Wuhan 430071, China;1. DICATAM, Università di Brescia, via Branze 43, 25123 Brescia, Italy;2. Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, United States;3. Center for Shock Wave-processing of Advanced Reactive Materials, University of Notre Dame, Notre Dame, IN, United States;1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Power Engineering, Chongqing University, Chongqing 400044, China;3. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;1. Ontario Power Generation, Ajax, ON, Canada L1S 7P9;2. Queen׳s University, Kingston, ON, Canada K7L 3N6;3. Royal Military College of Canada, Kingston, ON, Canada K7K 7B4;1. Steinbuch Centre for Computing SCC, Karlsruhe Institute of Technology KIT, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;2. Information Systems Institute, Vienna University of Technology, Argentinierstrasse 8/184-1, 1040 Vienna, Austria |
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| Abstract: | In the gap-ratio range of 0.0≤G≤7.0, a particle image velocimetry PIV is applied to conduct a systematic experimental research of the flow around a horizontal circular cylinder in the cross-flow of shallow water. The velocity distribution of transient flow field at various gap-ratios is obtained. Based on these data, the phenomena and rules of the vortex and its course of generation, development and evolvement at various gap-ratios are analyzed, and it is found that there are similar unshedding vortex structures at G = 0.0 and G = 7.0, and others are structures of shedding vortex. The figures of typical vortex movements are given. Based on this, the differences between the transient flow field and the time-averaged flow field and the characteristics of the vortex structures are analyzed. In addition when the Strouhal number keeps constant (about 0.2) concerning vortex shedding have been discussed. The findings of this paper are of guiding significance for engineering issues with similar flowing features. |
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| Keywords: | PIV flow around a circular cylinder vortex structure Strouhal number |
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