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Experimental assessment of the flutter stability of a laminar airfoil in transonic flow

Hebler, Anne (2017) Experimental assessment of the flutter stability of a laminar airfoil in transonic flow. In: IFASD 2017 - International Forum on Aeroelasticity and Structural Dynamics. International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2017, 25.-28. Jun. 2017, Como, Italien. ISBN 978-88-97576-28-0

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Abstract

First results of a flutter experiment in transonic flow are presented. A wind tunnel model with the laminar CAST 10-2 airfoil was mounted elastically with heave and pitch degrees of freedom in the Transonic Wind Tunnel Goettingen. Laser triangulators and acceleration sensors were used to record the motion of the model. Measurements were taken with free and fixed boundary layer transition in a Mach number range of 0.5 < Ma < 0.85 and for chord Reynolds numbers of 1.0*10^6 < Re < 3.5*10^6. For free transition flutter and limit cycle oscillations occurred both when the degrees of freedom were structurally coupled and when the degrees of freedom were only aerodynamically coupled. However when the boundary layer transition was fixed at 7.5% chord, flutter occured only in the case of structurally coupled degrees of freedom.

Item URL in elib:https://elib.dlr.de/113158/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental assessment of the flutter stability of a laminar airfoil in transonic flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
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:flutter boundary, experiment, laminar airfoil, transonic flow, aeroelastic stability
Event Title:International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2017
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 - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Experiments
Deposited By: Hebler, Anne
Deposited On:23 Oct 2017 11:09
Last Modified:23 Oct 2017 11:09

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