Abstract
Suppression of Vortex-induced Vibration (VIV) holds the key to numerous engineering structures as it can result in high amplitude vibrations of a structure, causing fatigue and eventual failure. Experimental results in a wind tunnel on VIV suppression using a screen shroud of 58% porosity showed that the mesh is effective in VIV suppression by 86%. To further explore the mechanism of VIV reduction using a screen shroud, the flow structure in the near wake around a permeable screen cylinder is investigated using Particle Image Velocimetry (PIV). The tests were conducted at a Reynolds number of about 3200 in a water flume. The screen cylinder was made of a stainless-steel wire mesh rolled into a cylinder shape with 58% porosity. The results are compared with that of a bare cylinder in order to evaluate the effectiveness of a screen cylinder on wake modification in the near wake region. The results illustrated that a 58% porosity cylinder could extend the vortex formation length significantly and effectively reduce vortex intensity by more than 57%. These findings are helpful to explain why a screen cylinder used as a shroud is effective in suppressing VIV. © 2018 Australasian Fluid Mechanics Society. All rights reserved.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 21st Australasian Fluid Mechanics Conference |
| Editors | Timothy C.W. Lau, Richard M. Kelso |
| Publisher | Australasian Fluid Mechanics Society |
| Number of pages | 4 |
| ISBN (Electronic) | 978-0-646-59784-3 |
| Publication status | Published - 2018 |
| Event | 21st Australasian Fluid Mechanics Conference - Adelaide Convention Centre, Adelaide, Australia Duration: 10 Dec 2018 → 13 Dec 2018 Conference number: 21 http://afms.org.au/19AFMC/ |
Conference
| Conference | 21st Australasian Fluid Mechanics Conference |
|---|---|
| Abbreviated title | AFMC 2018 |
| Country/Territory | Australia |
| City | Adelaide |
| Period | 10/12/18 → 13/12/18 |
| Internet address |