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Effect of Peak Perforation on Flow Past A Conic Cylinder at Re=100: Drag, Lift and Strouhal Number

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文摘 A flow past a circular-section cylinder with a perforated conic shroud, in which the perforation is located at the peak of the conic disturbance as the shroud installed on the cylinder and uniformly distributed with several circular holes, is numerically simulated at a Reynolds number of 100. Two factors in the perforation are taken into account, i.e. the attack angle relative to the direction of incoming flow and diameter of holes. The effect of such perforation on the drag, lift and vortex-shedding frequency is mainly investigated. Results have shown that variation of the attack angle has a little effect, especially on the drag and vortex-shedding frequency, except in certain cases due to the varied vortex-shedding patterns in the near wake. The increasing hole diameter still exhibits a little effect on the drag and frequency of vortex shedding, but really reduces the lift, in particular at larger wavelength, such as the lift reduction reaching almost 66%-68% after introducing the perforation.
来源 China Ocean Engineering ,2017,31(3):330-340 【核心库】
DOI 10.1007/s13344-017-0039-9
关键词 vortex-induced vibration ; perforation ; conic disturbance ; drag ; lift ; Strouhal number
地址

Institute of Mechanics, Chinese Academy of Sciences, The Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Beijing, 100190

语种 英文
文献类型 研究性论文
ISSN 0890-5487
学科 海洋学
基金 supported by the National Key Scientific Instrument and Equipment Development Program of China
文献收藏号 CSCD:6001767

参考文献 共 38 共2页

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引证文献 2 篇

1 Lin L M Effect of perforation on flow past a conic cylinder at Re = 100: vortex-shedding pattern and force history Acta Mechanica Sinica,2018,34(2):238-256
被引 3 次

2 Lin L M Effect of perforation on flow past a conic cylinder at Re = 100: wavy vortex and sign laws Acta Mechanica Sinica,2018,34(5):812-829
被引 3 次

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