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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 (2014) Forced synthetic turbulence approach to stimulate resolved turbulence generation in embedded LES. 5th Symposium on Hybrid RANS-LES Methods, 19. - 21. March 2014, Houston, USA.

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Official URL: http://mwikicfd.mace.manchester.ac.uk/hrlm/general-information

Abstract

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 imple- mentation was tested in a flat plate boundary layer and verified against experimen- tal 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/93119/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Revised Full Papers will be published (Springer Series: "Notes on Numerical Fluid Mechanics and Multidisciplinary Design").
Title:Forced synthetic turbulence approach to stimulate resolved turbulence generation in embedded LES
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
François, Daniela GiseleInstitute of Fluid Mechanics, Technische Universität BraunschweigUNSPECIFIED
Radespiel, RolfTU BraunschweigUNSPECIFIED
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
Series Name:Conference Proceedings
Status:Published
Keywords:synthetic turbulence, embedded LES, DLR-TAU code, HGR-01 airfoil
Event Title:5th Symposium on Hybrid RANS-LES Methods
Event Location:Houston, USA
Event Type:international Conference
Event Dates:19. - 21. March 2014
Organizer:TEXAS A&M University
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:12 Dec 2014 14:10
Last Modified:12 Dec 2014 14:10

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