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Experiments on the influence of surface curvature upon the development of streamwise vortices in an unstable three-dimensional boundary-layer flow.

Bippes, H. (1995) Experiments on the influence of surface curvature upon the development of streamwise vortices in an unstable three-dimensional boundary-layer flow. Zeitschrift für Flugwissenschaften und Weltraumforschung ZFW, 19, pp. 129-138.

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Abstract

The development of streamwise vortices and transition of the three-dimensional boundary layer flow on a curved surface is studied experimentally. The model is a cylindrical wing shaped body with concave and convex profile segments. It is set at a sweep angle of 30 degrees. In order to enable comparison with theory quasi two-dimensional flow conditions are approximated by means of countured end plates. The streamwise pressure gradient leads to the amplification of both Goertler and crossflow instabilities. The disturbance development is measured by means of hot-wire anemometry. Surface hot-films are used for tracing transition. Streamwise vortices are found to be strongly amplified along the concave segment in the presence of strong and weak crossflow as well. No characteristic difference is found for the streamwise vortices developing in the two cases.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1995,
Title:Experiments on the influence of surface curvature upon the development of streamwise vortices in an unstable three-dimensional boundary-layer flow.
Authors:
AuthorsInstitution or Email of Authors
Bippes, H.UNSPECIFIED
Date:1995
Journal or Publication Title:Zeitschrift für Flugwissenschaften und Weltraumforschung ZFW
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:19
Page Range:pp. 129-138
Series Name:2
Status:Published
Keywords:Transition, three-dimensional centrifugal instability, cross-flow instability
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:08

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