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Aeroelasticity of a laminar wing

Mai, Holger and Hebler, Anne (2011) Aeroelasticity of a laminar wing. In: Proceedings "IFASD 2011". IFASD 2011 - 15th International Forum on Aeroelasticity and Structural Dynamics, 26 - 30 June 2011, Paris, Frankreich.

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Within the DLR Institute of Aeroelasticity project iGREEN (integrated green aircraft) the aeroelastic behavior of a typical laminar airfoil under unsteady transonic flow conditions was to be investigated. For that a 2D airfoil model was build and tested in the transonic wind tunnel facility DNW-TWG in Goettingen. The model is a 2D-section with a CAST-10 profile, made of carbon reinforced fiber (CRF). It is equipped with 60 unsteady pressure sensors placed in one section and with hot-film sensors located on its upper and lower surface between 10% and 85% in steps of 5% in streamwise direction, 16 on each side. In order to get a smooth surface without disturbing the laminar flow, the hot-film foil is embedded in the model. In the steady case the upper surface of the model was observed with two infrared cameras. The model was installed in the institutes 2D test set-up for forced pitch oscillations. Under harmonic pitch oscillations the time dependent pressure distribution, global forces and the variation of the transition region were measured for three different flow conditions (subsonic, weak transonic and transonic with strong shock and possible separation). The results may lead to a physical understanding of the interaction of unsteady transition and shock position and act as validation data for new unsteady transition prediction models.

Item URL in elib:https://elib.dlr.de/70313/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Aeroelasticity of a laminar wing
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mai, Holgerholger.mai (at) dlr.deUNSPECIFIED
Journal or Publication Title:Proceedings "IFASD 2011"
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:laminar wing, transition, aeroelasticity, flutter stability
Event Title:IFASD 2011 - 15th International Forum on Aeroelasticity and Structural Dynamics
Event Location:Paris, Frankreich
Event Type:international Conference
Event Dates:26 - 30 June 2011
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
Deposited By: Erdmann, Daniela
Deposited On:03 Nov 2011 11:54
Last Modified:31 Jul 2019 19:32

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