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Automatic Transition Prediction in Unsteady Airfoil Flows Using an Unstructured CFD Code

Krumbein, Andreas and Krimmelbein, Normann and Seyfert, Cornelia (2011) Automatic Transition Prediction in Unsteady Airfoil Flows Using an Unstructured CFD Code. 29th AIAA Applied Aerodynamics Conference, 27. - 30. June 2011, Honolulu, Hawaii, USA.

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An unstructured Reynolds-averaged Navier-Stokes solver, a laminar boundary-layer code and a fully automated local, linear stability code were coupled in order to predict the laminar-turbulent transition in numerical flow simulations. The coupled system was designed to be applied to three-dimensional aircraft configurations of industrial relevance. The transition prediction approach based on the eN-method is now applied to pitching airfoils and the impact of taking into account the laminar-turbulent transition locations in the unsteady simulations on the lift and moment coefficients is investigated. Different transition prediction modes which are available in the coupled system are applied and the influences of the different approaches on the solution are pointed out and compared to each other. Besides some basic tests, the work focuses on the OA209 airfoil in dynamic stall conditions, emphasizing a light stall and a deep stall case. The prediction of the laminar-turbulent transition points and their consideration in the coupled computation is done in a fully automatic manner. In addition, first results from computations using a transition transport model are shown.

Item URL in elib:https://elib.dlr.de/70474/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Automatic Transition Prediction in Unsteady Airfoil Flows Using an Unstructured CFD Code
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Krumbein, Andreasandreas.krumbein (at) dlr.deUNSPECIFIED
Krimmelbein, Normannnormann.krimmelbein (at) dlr.deUNSPECIFIED
Seyfert, Corneliacornelia.seyfert (at) dlr.deUNSPECIFIED
Date:27 June 2011
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-14
Series Name:Conference Proceedings online
Keywords:transition, automatic transition prediction, Reynolds averaged Navier-Stokes, DLR TAU code, local linear stability code, laminar boundary-layer code, unsteady flows, dynamic stall, pitching oscillations
Event Title:29th AIAA Applied Aerodynamics Conference
Event Location:Honolulu, Hawaii, USA
Event Type:international Conference
Event Dates:27. - 30. June 2011
Organizer:American Institute of Aeronautics and Astronautics (AIAA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > CASE
Deposited By: Krumbein, Dr.-Ing. Andreas
Deposited On:30 Aug 2011 15:51
Last Modified:30 Aug 2011 15:51

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