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Wake Evolution of High-Lift Configuration from Roll-Up to Vortex Decay

Misaka, Takashi and Holzäpfel, Frank and Gerz, Thomas (2013) Wake Evolution of High-Lift Configuration from Roll-Up to Vortex Decay. 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 7.-10. Jan. 2013, Grapevine (Dallas/Ft. Worth Region), Texas, USA.

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Official URL: http://www.aiaa.org


The development of aircraft’s wake in high-lift configuration is studied from the rollup until vortex decay. An aircraft model and the surrounding flow field obtained from high-fidelity Reynolds-averaged Navier-Stokes simulation are swept through a ground-fixed computational domain to initialize the wake. After the wake initialization, the large-eddy simulation (LES) of the vortical wake is performed until vortex decay. In this paper we consider an aircraft model in high-lift configuration where flaps and slats are deployed. In a few wingspan lengths downstream, the complex vorticity structures of the aircraft wake focus on co-rotating vortex pairs originated from wing- and flap-tips. Each co-rotating vortex pair merges at t∗= 0.25 and a common counter-rotating vortex pair is formed at around t∗= 1.0 entraining the turbulent wake into the vortex system. The rolled-up vortex has axial velocity in the vortex core whose magnitude is a half of the maximum tangential velocity. Behaviors of the formed vortex pair are similar to those of a typical vortex pair defined by a vortex model such as the Lamb-Oseen model. The descent speed of the vortices is slightly faster than that of the reference descent speed, i.e., w = 1.1w0. In addition it is confirmed that the ambient turbulence accelerates vortex linking and decay as in the case of a typical vortex pair. The overall behavior of wake vortices is not affected by the difference of mesh resolution considered here, except for vortex core radius.

Item URL in elib:https://elib.dlr.de/80839/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Wake Evolution of High-Lift Configuration from Roll-Up to Vortex Decay
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Misaka, Takashimisaka (at) edge.ifs.tohoku.ac.jpUNSPECIFIED
Holzäpfel, Frankfrank.holzaepfel (at) dlr.deUNSPECIFIED
Gerz, Thomasthomas.gerz (at) dlr.deUNSPECIFIED
Date:January 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-11
Series Name:AIAA Paper
Keywords:wake vortex, large eddy simulation, roll-up, decay, high-lift, data assimilation
Event Title:51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
Event Location:Grapevine (Dallas/Ft. Worth Region), Texas, USA
Event Type:international Conference
Event Dates:7.-10. Jan. 2013
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Air Traffic and Weather (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Holzäpfel, Dr. habil. Frank
Deposited On:08 Feb 2013 16:42
Last Modified:08 Feb 2013 16:42

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