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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.
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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: |
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| 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: |
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| 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 | ||||||||
| HGF - Program: | Aeronautics | ||||||||
| HGF - Program Themes: | L AR - Aircraft Research | ||||||||
| DLR - Research area: | Aeronautics | ||||||||
| DLR - Program: | L AR - Aircraft Research | ||||||||
| DLR - Research theme (Project): | ["eprint_fieldopt_dlr_project_search_L000" not defined] | ||||||||
| 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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