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Large-Eddy Simulation of Wake Vortex Evolution from Roll-Up to Vortex Decay

Misaka, Takashi and Holzäpfel, Frank and Gerz, Thomas and Manhart, Michael and Schwertfirm, Florian (2011) Large-Eddy Simulation of Wake Vortex Evolution from Roll-Up to Vortex Decay. In: AIAA Paper 2011-1003, pp. 1-11. 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 4 - 7 Jan 2011, Orlando, USA.

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Official URL: http://www.aiaa.org/content.cfm?pageid=230&lumeetingid=2388

Abstract

Large-eddy simulation (LES) of wake vortex evolution from vortex generation until decay is performed by combining Reynolds-averaged Navier-Stokes (RANS) simulation and LES. An aircraft model and a surrounding flow field obtained from high-fidelity RANS simulation are swept through a ground fixed computational domain to initialize the wake. After the initialization, time integration of the wake is performed until vortex decay (2-3 minutes). The present paper describes the approach and some results from the simulations where the aircraft is represented by the DLR-F6 wing-body model. The results show that moderate mesh resolution in the wake initialization phase results in lower vortex circulation of wake vortex after roll-up, although the overall distribution of vorticity is not sensitive to the mesh resolution. Boundary condition in the flight direction is one of the key points to continue the time integration of wake vortex after its initialization. Periodic boundary conditions used in this study induce disturbances propagating from boundaries into the computational domain, which leads to faster decay of wake vortex.

Document Type:Conference or Workshop Item (Speech)
Title:Large-Eddy Simulation of Wake Vortex Evolution from Roll-Up to Vortex Decay
Authors:
AuthorsInstitution or Email of Authors
Misaka, TakashiDLR
Holzäpfel, FrankDLR
Gerz, ThomasDLR
Manhart, MichaelTU München
Schwertfirm, FlorianKreuzinger+Manhart Turbulenz GmbH
Date:January 2011
Journal or Publication Title:AIAA Paper 2011-1003
Refereed publication:Yes
In ISI Web of Science:No
Page Range:pp. 1-11
Status:Published
Keywords:Wake vortex, LES, Roll-up, Vortex decay
Event Title:49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
Event Location:Orlando, USA
Event Type:international Conference
Event Dates:4 - 7 Jan 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Takashi Misaka
Deposited On:12 Dec 2011 10:59
Last Modified:09 Feb 2012 16:03

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