Dynamic interactions of a supercritical aerofoil in the presence of transonic shock buffet

Giannelis, N. F.; Vio, G. A.; Dimitriadis, Grigorios

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Dynamic interactions of a supercritical aerofoil in the presence of transonic shock buffet

Giannelis, N. F.; Vio, G. A.; Dimitriadis, Grigorios

2016 • In Proceedings of the International Conference on Noise and Vibration Engineering, ISMA 2016

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Keywords :

Aeroelasticity; Transonic flow; Shock buffetting

Abstract :

[en] Within a narrow transonic flight region, shock-wave/boundary-layer interactions yield large amplitude, self sustained shock oscillations that are detrimental to both platform handling quality and structural integrity. In this study, the aeroelastic interactions between this transonic buffet instability and a spring-suspended supercritical aerofoil are investigated by means of Reynolds-Averaged Navier-Stokes simulations. Single degree-of-freedom pitching simulations are performed for a range of structural to aerodynamic frequency ratios, sectional mass ratios and levels of structural damping. The results show that for a range of pitch eigenfrequencies above the fundamental buffet frequency, sychronisation of the aerodynamic and structural modes occurs. This so called lock-in phenomenon acts as a mechanism for large amplitude Limit Cycle Oscillation in aircraft structures within the transonic flow regime. The sectional mass and the addition of structural damping are both found to have a pronounced effect on the nature of the limit cycles

Disciplines :

Aerospace & aeronautics engineering

Author, co-author :

Giannelis, N. F.; University of Sydney > School of Aerospace, Mechanical and Mechatronic Engineering

Vio, G. A.; University of Sydney > School of Aerospace, Mechanical and Mechatronic Engineering

Dimitriadis, Grigorios ; Université de Liège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale

Language :

English

Title :

Dynamic interactions of a supercritical aerofoil in the presence of transonic shock buffet

Publication date :

19 September 2016

Event name :

International Conference on Noise and Vibration Engineering, ISMA 2016

Event organizer :

KUL

Event place :

Leuven, Belgium

Event date :

from 19-09-2016 to 21-09-2016

Audience :

International

Main work title :

Proceedings of the International Conference on Noise and Vibration Engineering, ISMA 2016

Pages :

Paper ID 584

Additional URL :

https://www.isma-isaac.be/isma_conf/objectives.html

Available on ORBi :

since 20 October 2016

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