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CFD-Based Flutter Prediction for High Reynolds Number Flows with Free Boundary Layer Transition

Fehrs, Michael and Nitzsche, Jens and Hebler, Anne (2017) CFD-Based Flutter Prediction for High Reynolds Number Flows with Free Boundary Layer Transition. In: IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics. IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics, 25.-28. Jun. 2017, Como, Italien. ISBN 978-88-97576-28-0

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Abstract

This paper introduces a local, correlation-based transition model used for CFD- based flutter predictions. The presented gamma transition model is based on the gamma transport equation of the gamma-Re_theta transition model. The model is calibrated for external aerodynamic flows in a low turbulence environment and is validated based on experimental data for moderate and high Reynolds numbers found in free flight. A steady 2D validation case, a steady 3D test case for comparison with the e^N method, an unsteady 2D validation test case, and an unsteady 2D test case for comparison with the e^N method are presented. In addition, the effect of a boundary layer transition on the flutter behavior of an airfoil in transonic flow at a free flight Reynolds number is demonstrated.

Item URL in elib:https://elib.dlr.de/114751/
Document Type:Conference or Workshop Item (Speech)
Title:CFD-Based Flutter Prediction for High Reynolds Number Flows with Free Boundary Layer Transition
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fehrs, Michaelmichael.fehrs (at) dlr.deUNSPECIFIED
Nitzsche, Jensjens.nitzsche (at) dlr.deUNSPECIFIED
Hebler, Anneanne.hebler (at) dlr.deUNSPECIFIED
Date:June 2017
Journal or Publication Title:IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
ISBN:978-88-97576-28-0
Status:Published
Keywords:boundary layer transition, local correlation-based transition model, airfoil flutter
Event Title:IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics
Event Location:Como, Italien
Event Type:international Conference
Event Dates:25.-28. Jun. 2017
Organizer:Politechnico Milano, Department of Aerospace Science and Technology
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 - VicToria
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Institute of Aeroelasticity > Aeroelastic Experiments
Deposited By: Fehrs, Michael
Deposited On:27 Oct 2017 15:33
Last Modified:20 Dec 2017 13:34

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