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Reynolds-number effects in flow around more-or-less bluff bodies

Schewe, G. (2001) Reynolds-number effects in flow around more-or-less bluff bodies. Journal of wind engineering and industrial aerodynamics, 89 (14-15), pp. 1267-1289.

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This paper reviews the results of experiments carried out over a wide range of Reynolds numbers (10^4<Re<10^7) on 2-D sections in the high-pressure wind tunnel in Göttingen. The bodies are circular cylinder, a sharp-edged, trapezoidal-shaped bridge element, and a thick airfoil at a high attack angle. In all cases, appropriately shifting the value of Re led to dramatic changes in the force coefficients and St. number. Changes in the topological structure of the separated flow cause the observed phenomena: oil-flow pictures were used to make the phenomena visible. These events, which are triggered by the laminar/turbulent transition and its location, have characteristics that appear to be universally valid because they occur in similar form in flow over the three different bodies. The important results are: (i) flow around 2-D bodies can be highly three-dimensional; (ii) there are 2-D sections that behave as a bluff- or streamlined body, depending on Re; and (iii) slender bodies with sharp-edged cross-sections may also suffer pronounced Reynolds-number effects.

Item URL in elib:https://elib.dlr.de/14306/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2002,
Title:Reynolds-number effects in flow around more-or-less bluff bodies
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Journal or Publication Title:Journal of wind engineering and industrial aerodynamics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1267-1289
Keywords:Reynolds-number effects, bluff bodies, high lift flows, circular cylinder, bridge section
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L TG - Querschnittstechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:41

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