Flow control in flow–structure interaction |
| |
Authors: | R Galvao E Lee D Farrell F Hover M Triantafyllou N Kitney P Beynet |
| |
Institution: | aMassachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA;bBP Exploration, Middlesex TW16 7LN, UK |
| |
Abstract: | 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 Cd=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. |
| |
Keywords: | Vortex-induced vibrations Flow control |
本文献已被 ScienceDirect 等数据库收录! |
|