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FLUTTER PREDICTION IN THE TRANSONIC FLIGHT REGIME WITH THE γ-Re_θ TRANSITION MODEL

Fehrs, Michael and van Rooij, Anna C.L.M. and Nitzsche, Jens (2014) FLUTTER PREDICTION IN THE TRANSONIC FLIGHT REGIME WITH THE γ-Re_θ TRANSITION MODEL. In: Proceedings of the the jointly organized WCCM XI, ECCM V, ECFD VI, pp. 6334-6346. International Center for Numerical Methods in Engineering. 6th. European Conference on Computational Fluid Dynamics (ECFD VI), 20. - 25. Jul. 2014, Barcelona, Spanien. ISBN 978-84-942844-7-2

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Official URL: http://www.wccm-eccm-ecfd2014.org/frontal/default.asp

Abstract

This paper presents a utter analysis for the supercritical CAST 10-2 airfoil and the laminar NACA 64-008 airfoil in a flow with free boundary layer transition based on CFD computations. For transition prediction the γ-Re_θ transition model is used. The results are compared to fully turbulent results obtained with the SST k-ѡ model. Unsteady RANS computations at Re = 2e6� are used to determine the aerodynamic derivatives, required to identify the utter boundary for a 2 degree-of-freedom model. At the limits of the laminar drag bucket a decrease in utter stability can be found for both airfoils and the given structural model. However, the limits of the laminar bucket are strongly in uenced by the prescribed turbulence boundary conditions. In addition, an aerodynamic resonance and the possibility of a 1 degree-of-freedom flutter is found for the CAST 10-2 airfoil

Item URL in elib:https://elib.dlr.de/94555/
Document Type:Conference or Workshop Item (Speech)
Title:FLUTTER PREDICTION IN THE TRANSONIC FLIGHT REGIME WITH THE γ-Re_θ TRANSITION MODEL
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fehrs, Michaelmichael.fehrs (at) dlr.deUNSPECIFIED
van Rooij, Anna C.L.M.Anouk.vanRooij (at) dlr.deUNSPECIFIED
Nitzsche, JensJens.Nitzsche (at) dlr.deUNSPECIFIED
Date:July 2014
Journal or Publication Title:Proceedings of the the jointly organized WCCM XI, ECCM V, ECFD VI
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 6334-6346
Editors:
EditorsEmail
Oñate, EugenioUNSPECIFIED
Oliver, XavierUNSPECIFIED
Huerta, AntonioUNSPECIFIED
Publisher:International Center for Numerical Methods in Engineering
ISBN:978-84-942844-7-2
Status:Published
Keywords:boundary layer transition, -Re � transition model, transonic flow, airfoil flutter, aerodynamic resonance
Event Title:6th. European Conference on Computational Fluid Dynamics (ECFD VI)
Event Location:Barcelona, Spanien
Event Type:international Conference
Event Dates:20. - 25. Jul. 2014
Organizer:semni
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 Aeroelasticity > Aeroelastic Simulations
Deposited By: Fehrs, Michael
Deposited On:13 Jan 2015 10:44
Last Modified:31 Jul 2019 19:51

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