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Effect of flap strakes with regard to vortex wake alleviation

Stumpf, E. (2000) Effect of flap strakes with regard to vortex wake alleviation. In: ECCOMAS 2000 - Book of Abstracts. Artes Gráficas Torres S.A., Morales 17, E-08029 Barcelona. ECCOMAS 2000, Barcelona (e), 11.-14.09.2000. ISBN 84-89925-69-0.

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Abstract

Numerical simulations based on the three-dimensional Euler equations are used to investigate the nearfield bursting of the flap tip vortex of a narrow body airliner regarding vortex wake alleviation. Strake-like flap tip modifications with 80° and 70° backswept outer side-edge of the outboard flap are tested. The simulation quality of the vortex formation and spatial development is analysed by comparison to wind tunnel measurements of the spanwise lift distribution and to experimental five-hole-probe data. Very good agreement between measurement and computational results is achieved. Flap strakes are shown to be capable to trigger both bubble type vortex bursting and bursting above the suction side of the flap, leading to a wake-like flow structure. However, the flap vortex structure recovers shortly downstream of the bursting location. For the investigated high lift configuration the performed Euler computations do not give an indication that nearfield vortex bursting could lead to a reduction of circulation.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Effect of flap strakes with regard to vortex wake alleviation
Authors:
AuthorsInstitution or Email of Authors
Stumpf, E.UNSPECIFIED
Date:2000
Journal or Publication Title:ECCOMAS 2000 - Book of Abstracts
Editors:
EditorsEmail
International Center for Numerical Methods in Engineering (CIMNE), UNSPECIFIED
Publisher:Artes Gráficas Torres S.A., Morales 17, E-08029 Barcelona
ISBN:84-89925-69-0
Status:Published
Keywords:Vortex Wake, Vortex Breakdown, Vorticity, Euler Calculation, Unstructured Grid, DLR
Event Title:ECCOMAS 2000, Barcelona (e), 11.-14.09.2000
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 - Low-Emission Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: Claudia Grant
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:18

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