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Forced synthetic turbulence approach to stimulate resolved turbulence generation in embedded LES

François, Daniela Gisele and Radespiel, Rolf and Probst, Axel (2015) Forced synthetic turbulence approach to stimulate resolved turbulence generation in embedded LES. In: Progress in Hybrid RANS-LES Modelling Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 130. Springer International Publishing. pp. 81-92. doi: 10.1007/978-3-319-15141-0_6. ISBN 978-3-319-15140-3. ISSN 1612-2909.

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Official URL: http://link.springer.com/chapter/10.1007/978-3-319-15141-0_6


A synthetic turbulence generator is implemented in the DLR TAU-Code, to reduce the grey area that is typical for embedded LES approaches. The selected synthetic turbulence generator builds up a velocity field of fluctuations that reproduces the anisotropy and non-homogeneity of the boundary layer taken as reference from the RANS solution. In addition, the generator is significantly improved in order to reduce the numerical divergence of the generated velocity field and also to provide convective motion of the synthetic eddies. The implementation was tested in a flat plate boundary layer and verified against experimental data for the HGR-01 airfoil. The results show that the implementation shortens the transition distance to fully developed turbulence. The obtained flow profiles for the HGR-01 airfoil compare nicely to available PIV data.

Item URL in elib:https://elib.dlr.de/96151/
Document Type:Contribution to a Collection
Additional Information:Book Subtitle: Papers Contributed to the 5th Symposium on Hybrid RANS-LES Methods, 19-21 March 2014, College Station, A&M University, Texas, USA, Book Part: II, Online ISBN: 978-3-319-15141-0
Title:Forced synthetic turbulence approach to stimulate resolved turbulence generation in embedded LES
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
François, Daniela GiseleInstitute of Fluid Mechanics, Technische Universität BraunschweigUNSPECIFIED
Radespiel, RolfTechnische Universität Braunschweig, Institut für StrömungsmechanikUNSPECIFIED
Journal or Publication Title:Progress in Hybrid RANS-LES Modelling
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 81-92
EditorsEmailEditor's ORCID iD
Girimaji, SharathAerospace Engineering Department, Texas A&M UniversityUNSPECIFIED
Haase, WernerAeronautics ConsultantsUNSPECIFIED
Peng, Shia-HuiDiv Information & Aeronautical Syst, Swedish Defence Research Agency FOIUNSPECIFIED
Schwamborn, DieterDLRUNSPECIFIED
Publisher:Springer International Publishing
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Keywords:synthetic turbulence, embedded LES, DLR-TAU code, HGR-01 airfoil
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 (old)
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:12 May 2015 15:34
Last Modified:12 May 2015 15:34

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