| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Univ Sao Paulo, EPUSP, Dept Naval Architecture & Ocean Engn, Sao Paulo, SP - Brazil
[2] Univ Veracruzana, Dept Naval Architecture, Xalapa, Veracruz - Mexico
[3] CALTECH, Aerosp GALCIT, Pasadena, CA 91125 - USA
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | JOURNAL OF FLUIDS AND STRUCTURES; v. 74, p. 401-412, OCT 2017. |
| Web of Science Citations: | 6 |
| Abstract | |
The present work investigates the use of a polar array of 8 wake-control cylinders as a means of suppressing the vortex-induced vibration (VIV) of a larger circular cylinder. The diameter of the control cylinders and their rotation speed were the main parameters investigated. Experiments have been performed in water at Reynolds numbers between 5000 and 50,000. The rotating cylinders suppressed the peak amplitude of displacement by around 70% when compared to that of a bare cylinder. A similar response was obtained even if the rotation speed of the control cylinders was kept constant in relation to the flow speed. A specific configuration with 8 non-rotating control cylinders achieved an even better 99% suppression. As a consequence of reduced vibrations, the fluctuation of lift and mean drag were not as amplified due to VIV. The results pave the way for further studies concerning system optimization and support the development of efficient VIV suppressors and dynamic positioning systems for large floating offshore platforms and other applications. (C) 2017 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 14/50279-4 - Brasil Research Centre for Gas Innovation |
| Grantee: | Julio Romano Meneghini |
| Support Opportunities: | Research Grants - Applied Research Centers Program |
| FAPESP's process: | 11/00205-6 - Investigation of new methods for suppressing flow-induced vibrations of offshore structures |
| Grantee: | Gustavo Roque da Silva Assi |
| Support Opportunities: | Regular Research Grants |