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Influence of Transitional Flows at Transonic Mach Numbers on the Flutter Speed of a Laminar Airfoil

Fehrs, Michael (2013) Influence of Transitional Flows at Transonic Mach Numbers on the Flutter Speed of a Laminar Airfoil. In: Proceedings "IFASD 2013". IFASD, 24.-26. Juni 2013, Bristol, Great Britain.

Full text not available from this repository.

Abstract

This paper presents a flutter analysis for a supercritical airfoil with free boundary layer transition based on CFD simulations with the gamma-Re_theta transition model. The results are compared to results obtained by fully turbulent simulations with the SST k-w model. Unsteady RANS simulations at Re = 2·10^6 are used to determine the aerodynamic derivatives, required to solve the flutter equation for a 2-dof model by a k-method. It is found that the flutter boundary decreases for a flow with free boundary layer transition compared to a fully turbulent flow in the transonic flight regime in the vicinity of the transonic dip, whereas the flutter boundary is raised in the subsonic region. Furthermore, an aerodynamic resonance in connection with an instability of the transition region is found.

Item URL in elib:https://elib.dlr.de/83749/
Document Type:Conference or Workshop Item (Speech)
Title:Influence of Transitional Flows at Transonic Mach Numbers on the Flutter Speed of a Laminar Airfoil
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fehrs, MichaelAEUNSPECIFIED
Date:June 2013
Journal or Publication Title:Proceedings "IFASD 2013"
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Transition, Flattern, Transsonische Machzahlen
Event Title:IFASD
Event Location:Bristol, Great Britain
Event Type:international Conference
Event Dates:24.-26. Juni 2013
Organizer:Royal Aeronautical Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Fehrs, Michael
Deposited On:05 Sep 2013 15:53
Last Modified:08 May 2014 23:24

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