Article (Scientific journals)
Flutter and stall flutter of a rectangular wing in a wind tunnel
Norizham, Abdul Razak; Andrianne, Thomas; Dimitriadis, Grigorios
2011In AIAA Journal, 49 (10), p. 2258-2271
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Keywords :
Aeroelasticity; Stall flutter; Limit Cycle Oscillation; Bifurcation
Abstract :
[en] The aeroelastic behavior of a rectangular wing with pitch and plunge degrees of freedom was observed experimentally using pressure, acceleration and PIV measurements. The wing was set at different static angles of attack and wind tunnel airspeeds. The wing's dynamic behavior was governed by a two-parameter bifurcation from steady to Limit Cycle Oscillations (LCO), the two parameters being the airspeed and the static angle of attack. At the lowest static angle, the wing underwent a classical flutter phenomenon that was transformed into a supercritical Hopf bifurcation at higher angles. The latter was combined with a fold bifurcation at intermediate angles of attack. All LCOs observed were either low amplitude oscillations with time-varying amplitude or high amplitude oscillations with nearly steady amplitude. They were caused by two different types of dynamic stall phenomena. During low amplitude LCOs the periodically stalled flow covered only the rear part of the wing. During high amplitude LCOs, trailing edge and leading edge separation occured. Trailing edge separation was characterized by a significant amount of unsteadiness, varying visibly from cycle to cycle. The occurrence of leading edge separation was much more regular and had the tendency to stabilize the amplitude of the LCO motion.
Disciplines :
Aerospace & aeronautics 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 :
Flutter and stall flutter of a rectangular wing in a wind tunnel
Publication date :
2011
Journal title :
AIAA Journal
ISSN :
0001-1452
eISSN :
1533-385X
Publisher :
American Institute of Aeronautics and Astronautics, Reston, United States - Virginia
Volume :
49
Issue :
10
Pages :
2258-2271
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 February 2011

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