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Wind tunnel experiments on a flapping drone
Norizham, Abdul Razak; Dimitriadis, Grigorios
2011In Proceedings of the 15th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2011
 

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Keywords :
Flapping flight; dynamic stall; wake structure; vortex lattice method
Abstract :
[en] The motivation for this paper is to obtain a better understanding of the unsteady aerodynamic phenomena involved in flapping wing flight. The work is mainly experimental but also makes use of numerical results obtained from a vortex lattice approach. The flapping of 3D wings produces vortical structures which differ from those produced in 2D flow. It is a phenomenon experienced by any 3D lifting surfaces that are undergoing time dependent motion. In avian flight, it is known that different types of kinematics produce different kinds of vortical wake structures, depending on the wing aspect ratio. Understanding the wake structures and their effects can lead to the optimisation of flapping flight through the manipulation of these unsteady flow features. The objective of this work is to investigate the kinematics of 3D wings along with the evolution of the resulting vortex and wake structures while varying the oscillation parameters. The parameters in question are reduced frequency, flapping and pitching kinematics and wing profiles.The experiments make use of an enhanced version of a dynamically scaled mechanical flapping wing, which is modelled on large migrating birds with simplified kinematics. Pure flapping and combined pitching and flapping are tested in the wind tunnel and simulated at 6.0m/s, 9.4m/s and 14.8m/s.The model is forced to oscillate at four different frequencies.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Norizham, Abdul Razak ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Dimitriadis, Grigorios ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Language :
English
Title :
Wind tunnel experiments on a flapping drone
Publication date :
29 May 2011
Event name :
International Forum on Aeroelasticity and Structural Dynamics, IFASD 2011
Event organizer :
Association Aéronautique Astronautique de France (3AF)
Council of European Aerospace Sciences (CEAS)
American Institute of Aeronautics and Astronautics
Event place :
Paris, France
Event date :
from 26-06-2011 to 30-06-2011
Audience :
International
Main work title :
Proceedings of the 15th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2011
Pages :
Paper number IFASD-2011-154
Additional URL :
Available on ORBi :
since 30 June 2011

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