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Drag measurements of a circular cylinder with moving surface boundary-layer control

Korkischko, I. and Meneghini, J.R. and Konrath, Robert (2012) Drag measurements of a circular cylinder with moving surface boundary-layer control. C. Meskell & G. Bennett. 10th International Confernce on Flow-Induced Vibration (& Flow-Induced Noise), 02. - 06. Jul. 2012, Dublin, Ireland. ISSN 978-0-9548583-4-6

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Official URL: http://fiv2012.com

Abstract

Experimental results of flow around a circular cylinder with moving surface boundary-layer control (MSBC) are presented. Two small rotating cylinders strategically located inject momentum in the boundary layer of the cylinder, which delays the separation of the boundary layer. As a consequence, the wake becomes narrower and the fluctuating transverse velocity is reduced, resulting in a recirculation free region that prevents the vortex formation. The control parameter is the ratio between the tangential velocity of the moving surface and the flow velocity (Omega = Uc/U). The main advantage of the MSBC is the possibility of combining the suppression of vortexinduced vibration (VIV) and drag reduction. The experimental tests are preformed at a circulating water channel facility. In order to verify the effectiveness of the MSBC regarding drag reduction, two different techniques were employed to measure the mean drag of the cylinder with and without MSBC. The first method used a load cell to measure the drag, while the second one was based on the integration of velocity data along a line located on a averaged velocity field obtained through particle image velocimetry (PIV).

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Drag measurements of a circular cylinder with moving surface boundary-layer control
Authors:
AuthorsInstitution or Email of Authors
Korkischko, I.NDF, Department of Mechanical Engineering, POLI, University of Sao Paulo, Brazil
Meneghini, J.R.NDF, Department of Mechanical Engineering, POLI, University of Sao Paulo, Brazil
Konrath, RobertUNSPECIFIED
Date:2012
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 307-312
Publisher:C. Meskell & G. Bennett
Series Name:Proceedings of the 10th International conference on Flow-Induced Vibration (& Flow-Induce Noise)
ISSN:978-0-9548583-4-6
Status:Published
Keywords:Drag measurement, Wake flow control, MSBC, PIV
Event Title:10th International Confernce on Flow-Induced Vibration (& Flow-Induced Noise)
Event Location:Dublin, Ireland
Event Type:international Conference
Event Dates:02. - 06. Jul. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:19 Jul 2012 08:46
Last Modified:09 Oct 2012 15:03

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