Analysis of dynamic response of a very flexible Delta wing model in a wind tunnel

Barbason, Mathieu; Andrianne, Thomas; Hickey, Daryl; Dimitriadis, Grigorios

Reference : Analysis of dynamic response of a very flexible Delta wing model in a wind tunnel


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Aerospace & aeronautics engineering
	To cite this reference:	http://hdl.handle.net/2268/24439

Title :	Analysis of dynamic response of a very flexible Delta wing model in a wind tunnel
Language :	English
Author, co-author :	Barbason, Mathieu [Université de Liège - ULiège > Département Argenco : Secteur TLU+C > Urbanisme et aménagement du territoire >]
	Andrianne, Thomas [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique >]
	Hickey, Daryl [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques >]
	Dimitriadis, Grigorios [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale >]
Publication date :	Jul-2009
Main document title :	Proceedings of the 2009 International Forum on Aeroelasticity and Structural Dynamics
Publisher :	Azimuth Corporation
Pages :	Paper IFASD-2009-139
Peer reviewed :	No
On invitation :	No
Audience :	International
City :	Dayton, Ohio
Country :	USA
Event name :	International Forum on Aeroelasticity and Structural Dynamics, IFASD 2009
Event date :	du 21 juin au 25 juin 2009
Event organizer :	Council of European Aerospace Sciences, American Institute of Aeronautics and Astronautics
Event place (city) :	Seattle, Washington
Event country :	USA
Keywords :	[en] Aeroelasticity ; Limit Cycle Oscillations ; buffeting ; Delta wing
Abstract :	[en] Limit cycle oscillations involving Delta wings are an important area of research in modern aeroelasticity. Such phenomena can be the result of geometric nonlin- earity, aerodynamic nonlinearity or under-wing store nonlinearity. In this paper, a flexible half-Delta wing without stores is tested in a low speed wind tunnel in order to investigate its dynamic response. It is found that, at several combinations of airspeed and angle of attack, the wing undergoes high amplitude limit cycle oscillations. Three types of such oscillations are observed. Type 1 oscillations occur only at low angles of attack and are the result of a Hopf-type bifurcation. Type 2 limit cycle oscillations occur at intermedi- ate angles of attack and are the result of an atypical bifurcation. In other words, these oscillations appear as the airspeed is increased but disappear at even higher airspeeds. Type 3 oscillations occur at even higher angles of attack. A bispectrum analysis shows that type 3 limit cycle oscillations feature quadratic phase coupling. No such coupling was measured for type 2 oscillations, leading to the conclusion that the nonlinearity must be of higher order.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/24439
Other URL :	http://papers.ifasd2009.com/proceedings

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