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Internal Resonance and Stall-Flutter in a Pitch-Flap Wing in the Wind-Tunnel
Verstraelen, Edouard; Kerschen, Gaëtan; Dimitriadis, Grigorios
2015In Proceedings of the SEM IMAC XXXII
 

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Keywords :
Nonlinear Aeroelasticity; Wind-Tunnel testing; Stall-Flutter; Internal Resonance
Abstract :
[en] Nonlinear aeroelastic phenomena such as store-induced LCOs, transonic buzz and stall flutter are the burden or modern aircraft: they reduce the performance and can even limit the flight envelope in both civil and military cases. Several nonlinear setups were studied experimentally in the last decades by the scientific community but most of them have pitch and plunge degrees of freedom and feature a rigid wing. In this paper, we study a new nonlinear aeroelastic apparatus that features nonlinear pitch and flap degrees of freedom, coupled with a flexible wing. The model is tested experimentally in the wind tunnel to determine its dynamic behaviour. Preliminary observations demonstrate that the system undergoes a supercritical Hopf bifurcation due to the hardening nonlinearity followed by an amplitude jump that is the consequence of either dynamic stall (i.e. stall flutter) or internal resonance (i.e. interaction between the hardening nonlinearity and higher modes).
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Verstraelen, Edouard ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Kerschen, Gaëtan  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Dimitriadis, Grigorios ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Language :
English
Title :
Internal Resonance and Stall-Flutter in a Pitch-Flap Wing in the Wind-Tunnel
Publication date :
February 2015
Event name :
SEM IMAC XXXIII A Conference and Exposition on Structural Dynamics
Event organizer :
Society for Experimental Mechanics
Event place :
Orlando, United States - Florida
Event date :
February 3 - 6 2015
Audience :
International
Main work title :
Proceedings of the SEM IMAC XXXII
European Projects :
FP7 - 307265 - NOVIB - The Nonlinear Tuned Vibration Absorber
Name of the research project :
The Nonlinear Tuned Vibration Absorber (NoVib)
Funders :
EU - European Union [BE]
Available on ORBi :
since 06 November 2014

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