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Control of flow around bluff bodies by passive wake ventilation

Grosche, Friedrich-Reinhard and Lu, Mei and Kreplin, Hans-Peter (2003) Control of flow around bluff bodies by passive wake ventilation. In: New results in numerical and experimental fluid mechanics IV Notes on numerical fluid mechanics and multidisciplinary design, 87. Springer Verlag. pp. 140-147. ISBN 3-540-20258-7.

Full text not available from this repository.

Abstract

Flow control by passive ventilation of wakes of spheres and elongated bluff bodies of different fineness ratios was investigated in the Göttingen High Pressure Wind Tunnel at Reynolds numbers up to 10<sup>7</sup>. Wake ventilation was provided by a central duct along the model axis connecting the stagnation region in front of the body with the wake region in the rear. A very substantial drag reduction was observed at supercritical and transcritical Reynolds numbers, reaching up to 66% for spheres. High drag reductions were also found for elongated bluff bodies at angle of incidence 5 deg and 10 deg. At zero angle of incidence the ventilation effect decreases with increasing fineness ratio. Pitching moment was enhanced by wake ventilation.

Document Type:Contribution to a Collection
Additional Information: LIDO-Berichtsjahr=2005,
Title:Control of flow around bluff bodies by passive wake ventilation
Authors:
AuthorsInstitution or Email of Authors
Grosche, Friedrich-ReinhardUNSPECIFIED
Lu, MeiUNSPECIFIED
Kreplin, Hans-PeterUNSPECIFIED
Date:2003
Journal or Publication Title:New results in numerical and experimental fluid mechanics IV
Refereed publication:Yes
In ISI Web of Science:No
Volume:87
Page Range:pp. 140-147
Editors:
EditorsEmail
C. Breitsamter et al., UNSPECIFIED
Publisher:Springer Verlag
Series Name:Notes on numerical fluid mechanics and multidisciplinary design
ISBN:3-540-20258-7
Status:Published
Keywords:bluff bodies, separation control, ventilation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L -- no assignement
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: elib DLR-Beauftragter
Deposited On:15 Feb 2006
Last Modified:14 Jan 2010 19:45

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