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Airfoil Stall Simulations with Algebraic Delayed DES and Physically Based Synthetic Turbulence for RANS-LES Transition

François, Daniela G. and Radespiel, Rolf and Probst, Axel (2014) Airfoil Stall Simulations with Algebraic Delayed DES and Physically Based Synthetic Turbulence for RANS-LES Transition. American Institute of Aeronautics and Astronautics. AIAA Aviation and Aeronautics Forum and Exposition (AVIATION 2014), 16. – 20. June 2014, Atlanta, GA, USA.

Full text not available from this repository.

Official URL: http://arc.aiaa.org | DOI: 10.2514/6.2014-2574

Abstract

For accurate computations of massively separated flows, a variety of Detached Eddy Simulation (DES) approaches have been recently developed. The Algebraic Delayed Detached Eddy Simulation (ADDES) proved to be an efficient approach in performing a reliable switch between RANS and LES regions, thus avoiding Modeled Stress Depletion (MSD). Nevertheless, as with other embedded LES approaches, it requires a large adaptation distance until LES regenerates the physically expected turbulence content, downstream of the RANS-LES interface. In order to shorten this grey area of the embedded LES approaches, a flexible synthetic turbulence generator that can provide a physically realistic velocity field of fluctuations is further developed and applied. The implementation is first tested in a flat plate boundary layer and then for the HGR-01 airfoil at high angles of attack where is validated against experimental data. Results have shown that, applying synthetic turbulence, the generation of turbulent content is effectively accelerated and the resolved turbulence shows good agreement with PIV data. In addition, visualizations and spectral analysis display the physical behavior of turbulence in the LES region.

Item URL in elib:https://elib.dlr.de/89376/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA 2014-2574, 32nd AIAA Applied Aerodynamics Conference, DOI: 10.2514/6.2014-2574
Title:Airfoil Stall Simulations with Algebraic Delayed DES and Physically Based Synthetic Turbulence for RANS-LES Transition
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
François, Daniela G.Technische Universität Braunschweig, Institut für StrömungsmechanikUNSPECIFIED
Radespiel, RolfTechnische Universität Braunschweig, Institut für StrömungsmechanikUNSPECIFIED
Probst, Axelaxel.probst (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:2574
Page Range:pp. 1-16
Publisher:American Institute of Aeronautics and Astronautics
Series Name:Conference Proceedings online
Status:Published
Keywords:Airfoil Stall Simulations, Algebraic Delayed DES, RANS-LES, Modeled Stress Depletion (MSD), flexible synthetic turbulence generator, flat plate boundary layer
Event Title:AIAA Aviation and Aeronautics Forum and Exposition (AVIATION 2014)
Event Location:Atlanta, GA, USA
Event Type:international Conference
Event Dates:16. – 20. June 2014
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Micknaus, Ilka
Deposited On:17 Jul 2014 10:07
Last Modified:20 Oct 2014 14:00

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