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

Korkischko, I. und Meneghini, J.R. und 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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Offizielle URL: http://fiv2012.com

Kurzfassung

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).

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Drag measurements of a circular cylinder with moving surface boundary-layer control
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
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, RobertNICHT SPEZIFIZIERT
Datum:2012
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 307-312
Verlag:C. Meskell & G. Bennett
Name der Reihe:Proceedings of the 10th International conference on Flow-Induced Vibration (& Flow-Induce Noise)
ISSN:978-0-9548583-4-6
Status:veröffentlicht
Stichwörter:Drag measurement, Wake flow control, MSBC, PIV
Veranstaltungstitel:10th International Confernce on Flow-Induced Vibration (& Flow-Induced Noise)
Veranstaltungsort:Dublin, Ireland
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:02. - 06. Jul. 2012
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation & Validierung
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Hinterlegt von: Ilka Micknaus
Hinterlegt am:19 Jul 2012 08:46
Letzte Änderung:09 Okt 2012 15:03

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