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, . 3rd ONERA-DLR Aerospace Symposium, Paris, 20.-22. Juni 2001. ISBN 2-7257-006-X.
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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)|
|Title:||Near- to Midfield-Wake: Experimental Characterisation|
|Journal or Publication Title:||3rd ONERA-DLR Aerospace Symposium ODAS 2001|
|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|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L - no assignement|
|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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