Reference : Analysis of dynamic response of a very flexible Delta wing model in a wind tunnel |
Scientific congresses and symposiums : Paper published in a book | |||
Engineering, computing & technology : Aerospace & aeronautics engineering | |||
http://hdl.handle.net/2268/24439 | |||
Analysis of dynamic response of a very flexible Delta wing model in a wind tunnel | |
English | |
Barbason, Mathieu ![]() | |
Andrianne, Thomas ![]() | |
Hickey, Daryl [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques >] | |
Dimitriadis, Grigorios ![]() | |
Jul-2009 | |
Proceedings of the 2009 International Forum on Aeroelasticity and Structural Dynamics | |
Azimuth Corporation | |
Paper IFASD-2009-139 | |
No | |
No | |
International | |
Dayton, Ohio | |
USA | |
International Forum on Aeroelasticity and Structural Dynamics, IFASD 2009 | |
du 21 juin au 25 juin 2009 | |
Council of European Aerospace Sciences, American Institute of Aeronautics and Astronautics | |
Seattle, Washington | |
USA | |
[en] Aeroelasticity ; Limit Cycle Oscillations ; buffeting ; Delta wing | |
[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. | |
Researchers ; Professionals | |
http://hdl.handle.net/2268/24439 | |
http://papers.ifasd2009.com/proceedings |
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