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Influence of boundary layer transition on the flutter behavior of a supercritical airfoil

Fehrs, Michael and van Rooij, Anna C.L.M. and Nitzsche, Jens (2015) Influence of boundary layer transition on the flutter behavior of a supercritical airfoil. CEAS Aeronautical Journal, 6 (2), pp. 291-303. Springer. DOI: 10.1007/s13272-014-0147-7 ISBN 1869-5582 ISSN 1869-5590

Full text not available from this repository.

Official URL: http://link.springer.com/article/10.1007/s13272-014-0147-7

Abstract

This paper presents a flutter analysis for the supercritical CAST 10-2 airfoil in a flow with free boundary layer transition based on CFD computations with the γ-Reθ transition model. The results are compared to fully turbulent results obtained with the SST k-ω turbulence model. Unsteady RANS computations at Rec=2×106 are used to determine the aerodynamic derivatives. These derivatives are required to identify the flutter boundary for a 2 degree-of-freedom model by a k method. The transonic flutter boundary decreases for a flow with free boundary layer transition compared to a fully turbulent flow in the vicinity of the transonic dip. However, the flutter boundary at subsonic Mach numbers is raised for a transitional flow. In addition, the transitional frequency response is discussed: an aerodynamic resonance in connection with an instability of the transition region is observed and the possibility of a 1 degree-of-freedom flutter for transitional flows is shown.

Item URL in elib:https://elib.dlr.de/101006/
Document Type:Article
Title:Influence of boundary layer transition on the flutter behavior of a supercritical airfoil
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:June 2015
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:6
DOI :10.1007/s13272-014-0147-7
Page Range:pp. 291-303
Publisher:Springer
ISSN:1869-5590
ISBN:1869-5582
Status:Published
Keywords:Boundary layer transition Transonic flutter CAST 10-2 airfoil γ-Reθ transition model Aerodynamic resonance 1 degree-of-freedom flutter
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:22 Dec 2015 14:58
Last Modified:08 Mar 2018 19:01

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