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Near- to Midfield-Wake: Experimental Characterisation

Stuff, R. and Dieterle, L. and Horstmann, K.-H. and Pailhas, G. and Coton, P. and Lozier, J.-F. (2001) Near- to Midfield-Wake: Experimental Characterisation. In: 3rd ONERA-DLR Aerospace Symposium ODAS 2001, S2-1-5Seiten. 3rd ONERA-DLR Aerospace Symposium, Paris, 20.-22. Juni 2001. ISBN 2-7257-006-X.

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Abstract

The wake of wide body aircraft is a hazard to following aircraft in approach, climb, and cruise. Thus, a large amount of experimental research effort has been devoted to instability and breakdown of vortices. However, investigations of the instabilities of vortices in the wake far field very often are lacking the link to the near field and are inconclusive as to the aerodynamic, whereas investigations of the wake in a wind tunnel very often miss the link to the mid- and far field at a sufficiently high Reynolds-number. For this reason, the wake of an Airbus A-300 with different flap settings was investigated in a joint ONERA/DLR-project in the catapult of ONERA Lille. The Particle Image Velocimetry was chosen as a non-intrusive testing technique. In a particular setting of the landing flaps, a premature breakdown of the vortex cores was observed. The origin of the breakdown was understood as a Raylleigh-Ludwieg instability, which occurs if destabilising centrifugal forces dominate stabilising pressure forces.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2002,
Title:Near- to Midfield-Wake: Experimental Characterisation
Authors:
AuthorsInstitution or Email of Authors
Stuff, R.UNSPECIFIED
Dieterle, L.UNSPECIFIED
Horstmann, K.-H.UNSPECIFIED
Pailhas, G.ONERA
Coton, P.ONERA
Lozier, J.-F.ONERA
Date:2001
Journal or Publication Title:3rd ONERA-DLR Aerospace Symposium ODAS 2001
Page Range:S2-1-5Seiten
Editors:
EditorsEmail
ONERA, DLRUNSPECIFIED
Series Name:Proceedings
ISBN:2-7257-006-X
Status:Published
Keywords:wake of wide body aircraft, instability and breakdown of vortices, Particle Image Velocimetry
Event Title:3rd ONERA-DLR Aerospace Symposium, Paris, 20.-22. Juni 2001
Organizer:ONERA, DLR
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):L - Flight Physics
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Ilka Micknaus
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:03

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