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Wind tunnel flutter testing on a highly flexible wing for aeroelastic validation in the transonic regime within the HMAE1 project

Govers, Yves and Mai, Holger and Arnold, Juergen and Dillinger, Johannes K.S. and Pereira, Allan K.A. and Jr., Carlos Breviglieri and Takara, Edgard K. and Correa, Manoela S. and Mello, Olympio A.F. and Marques, Rodrigo F.A. and Geurts, Evert G.M. and Creemers, Ralf J.C. and Timmermans, Huub S. and Habing, Remco and Kapteijn, Kees (2019) Wind tunnel flutter testing on a highly flexible wing for aeroelastic validation in the transonic regime within the HMAE1 project. In: IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics, IFASD. IFASD 2019 – International Forum on Aeroelasticity and Structural Dynamics, 10.-13. Juni 2019, Savannah, GA (USA).

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Abstract

The aircraft manufacturer Embraer, the German Aerospace Center (DLR), the Netherlands Aerospace Centre (NLR) and German-Dutch Wind Tunnels (DNW) have tested an innovative highly flexible wing within an aeroelastic wind tunnel experiment in the transonic regime. The HMAE1 project was initiated by Embraer to test its numerical predictions for wing flutter under excessive wing deformations in the transonic regime. A highly elastic fiberglass wing-body pylon nacelle wind tunnel model (see Figure 1), which is able to deform extensively, was constructed for the experiment. The model was instrumented with a large number of pressure orifices, strain gauges, stereo pattern recognition (SPR) markers and accelerometers. The wing was tested from Ma = 0.4 to Ma = 0.9 for different angles of attack and stagnation pressures. The static and dynamic behavior of the wing model was monitored and a new method to analyze its eigenfrequencies and damping ratios was used. In the past, the large amounts of data acquired during such experiments could only be evaluated with a time lag. An efficient method developed by DLR now allows performing the data analysis in real time [1, 2]. As a result, it was possible during the test to identify exactly which safety margins remained before the onset of flutter and the resulting possible destruction of the model.

Item URL in elib:https://elib.dlr.de/127962/
Document Type:Conference or Workshop Item (Speech)
Title:Wind tunnel flutter testing on a highly flexible wing for aeroelastic validation in the transonic regime within the HMAE1 project
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Govers, YvesYves.Govers (at) dlr.dehttps://orcid.org/0000-0003-2236-596X
Mai, HolgerHolger.Mai (at) dlr.deUNSPECIFIED
Arnold, JuergenJuergen.Arnold (at) dlr.deUNSPECIFIED
Dillinger, Johannes K.S.Johannes.Dillinger (at) dlr.deUNSPECIFIED
Pereira, Allan K.A.EmbraerUNSPECIFIED
Jr., Carlos BreviglieriEmbraerUNSPECIFIED
Takara, Edgard K.EmbraerUNSPECIFIED
Correa, Manoela S.EmbraerUNSPECIFIED
Mello, Olympio A.F.EmbraerUNSPECIFIED
Marques, Rodrigo F.A.EmbraerUNSPECIFIED
Geurts, Evert G.M.NLRUNSPECIFIED
Creemers, Ralf J.C.NLRUNSPECIFIED
Timmermans, Huub S.NLRUNSPECIFIED
Habing, RemcoDNWUNSPECIFIED
Kapteijn, KeesDNWUNSPECIFIED
Date:10 June 2019
Journal or Publication Title:IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:IFASD
Status:Published
Keywords:wind tunnel testing, highly flexible wing, flutter stability
Event Title:IFASD 2019 – International Forum on Aeroelasticity and Structural Dynamics
Event Location:Savannah, GA (USA)
Event Type:international Conference
Event Dates:10.-13. Juni 2019
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Structural Dynamics and System Identification
Institute of Aeroelasticity > Aeroelastic Experiments
Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Govers, Dr.-Ing. Yves
Deposited On:24 Jun 2019 15:33
Last Modified:17 Oct 2019 10:34

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