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Flow control in flow-structure interaction
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DOI：10.1016/j.jfluidstructs.2008.07.006.png)
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摘要
En 中文
We employ passive flow control using two-dimensional hydrofoils to reduce vortex-induced vibrations (VIV) and drag on a cylinder of circular cross-section. We test the hypothesis that by using foils to bend the streamlines around the cylinder, and hence forcing the flow to approach potential flow-like patterns VIV and drag will be reduced. A systematic parametric search, first using groups of two and then four foils, shows that it is possible to completely eliminate vibrations and reduce the drag coefficient to about C-d = 0.50 at sub-critical Reynolds numbers. This parametric search is conducted in conjunction with force measurement and particle image velocimetry on a fixed towed cylinder. The effectiveness of the foils in regards to VIV was further tested with an apparatus allowing free transverse vibrations of a towed cylinder. (C) 2008 Elsevier Ltd. All rights reserved.
Keyword:
Vortex-induced vibrations
Flow control
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3.5
论文数:
3.8K
被引数:
1.2W
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B
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