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Bifurcation analysis of a wing undergoing stall flutter oscillations in a wind tunnel
Norizham, Abdul Razak; Andrianne, Thomas; Dimitriadis, Grigorios
2010In Proceedings of ISMA2010
 

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Keywords :
Stall Flutter; Flow Visualization; Bifurcation
Abstract :
[en] Stall flutter is a Limit Cycle Oscillation (LCO) caused by the periodic separation of the flow around a wing immersed in a uniform fluid flow. The separation could be either partial or complete [1]. The work presented focuses on a wing undergoing stall flutter in the pitch degree of freedom. The phenomenon is analyzed from the structural and aerodynamic response perspectives. The objective of this study is to promote the understanding of stall flutter by characterizing the complete bifurcation behavior of the selected system. The wing section chosen for this study is NACA 0018 profile applied to a rectangular wing. The tests are carried out at different airspeeds and angles of attack. The measured aeroelastic responses are analyzed and the behavior of the dynamic system is characterized by fully describing its bifurcation. Structural accelerations as well as unsteady pressures around the mid-span point of the wing are measured and examined. Furthermore, flow field visualization by means of the Particle Image Velocimetry technique is used to demonstrate aspects of the unsteady flow field, such as the manifestation of separation and vortices.
Disciplines :
Mechanical engineering
Author, co-author :
Norizham, Abdul Razak ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Andrianne, Thomas  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique
Dimitriadis, Grigorios ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Language :
English
Title :
Bifurcation analysis of a wing undergoing stall flutter oscillations in a wind tunnel
Publication date :
20 September 2010
Event name :
International Conference on Noise and Vibration Engineering (ISMA 2010)
Event organizer :
Katholieke Universiteit Leuven
Event place :
Leuven, Belgium
Event date :
from 20-09-2010 to 22-09-2010
Audience :
International
Main work title :
Proceedings of ISMA2010
Publisher :
Katholieke Universiteit Leuven, Leuven, Belgium
ISBN/EAN :
9789073802872
Pages :
3587-3602
Available on ORBi :
since 15 September 2010

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