Aerodynamic modeling of a 2-dimensional airfoil with a covert-inspired deployable flap using a discrete vortex method
Waite, Josiah Mark
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https://hdl.handle.net/2142/99122
Description
Title
Aerodynamic modeling of a 2-dimensional airfoil with a covert-inspired deployable flap using a discrete vortex method
Author(s)
Waite, Josiah Mark
Issue Date
2017-07-21
Director of Research (if dissertation) or Advisor (if thesis)
Wissa, Aimy A
Department of Study
Mechanical Sci & Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Bio-inspired design
Vortex method
Unsteady aerodynamics
Abstract
Unmanned aerial vehicles are expected to fulfill increasingly complex mission requirements but are limited by their inability to efficiently perform high-angle-of-attack maneuvers at low Reynolds numbers, while birds seem to perform these maneuvers with little effort. Birds use a passively-deployed feather called the covert feather to correct for flow reversal over their wings during high-angle-of-attack maneuvers, thereby delaying the onset of stall. The overall research goal is to extend the understanding of the covert feather's role during flight in nature and learn from it to increase the mission adaptability and agility of engineered aerial vehicles during high-angle-of-attack maneuvers and during gust. This thesis presents experimental lift results that show the benefits of attaching a covert-inspired flap to the suction side of an airfoil. Results from a CFD solver are compared to the experimental results and show good agreement. Furthermore, this work reports on the development of a low-order discrete vortex model meant to predict the lift of an airfoil with a covert-inspired flap. Results show that the discrete vortex model is able to reproduce the experimental results for certain flap deflection angles.
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