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Suppression of the vortex-induced vibration of a circular cylinder surrounded by eight rotating wake-control cylinders

Silva-Ortega, M. and Assi, G. R. S. (2017) Suppression of the vortex-induced vibration of a circular cylinder surrounded by eight rotating wake-control cylinders. Journal of Fluids and Structures, 74 . pp. 401-412. ISSN 0889-9746. http://resolver.caltech.edu/CaltechAUTHORS:20171102-083624073

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.jfluidstructs.2017.07.002DOIArticle
http://www.sciencedirect.com/science/article/pii/S0889974616306272PublisherArticle
Additional Information:© 2017 Elsevier Ltd. Received 22 October 2016, Revised 26 April 2017, Accepted 3 July 2017, Available online 20 July 2017.
Group:GALCIT
Subject Keywords:Vortex-induced vibration; Suppression; Wake control; Drag reduction
Record Number:CaltechAUTHORS:20171102-083624073
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20171102-083624073
Official Citation:M. Silva-Ortega, G.R.S. Assi, Suppression of the vortex-induced vibration of a circular cylinder surrounded by eight rotating wake-control cylinders, In Journal of Fluids and Structures, Volume 74, 2017, Pages 401-412, ISSN 0889-9746, https://doi.org/10.1016/j.jfluidstructs.2017.07.002. (http://www.sciencedirect.com/science/article/pii/S0889974616306272)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82874
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:02 Nov 2017 17:01
Last Modified:02 Nov 2017 17:01

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