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

Schewe, G. (2003) Reynolds-number effects in flow around more-or-less bluff bodies. GAMM 2003-Annual Conference of the "Gesellschaft für Angewandte Mathematik und Mechanik", Abano Terme-Padova, Italy, 24-28 March 2003.

Full text not available from this repository.

Abstract

The lecture 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 a 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. No. 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/14400/
Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2003,
Title:Reynolds-number effects in flow around more-or-less bluff bodies
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schewe, G.UNSPECIFIEDUNSPECIFIED
Date:2003
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Reynolds number, bluff bodies, transition, hight lift flows
Event Title:GAMM 2003-Annual Conference of the "Gesellschaft für Angewandte Mathematik und Mechanik", Abano Terme-Padova, Italy, 24-28 March 2003
Organizer:Gesellschaft für Angewandte Mathematik und Mechanik
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:48

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