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Control of the Spanwise Distribution of Circulation on NACA 0012 and Flat Plate Wings

Williams, D. and Doshi, S. and Collins, J. and Colonius, T. (2007) Control of the Spanwise Distribution of Circulation on NACA 0012 and Flat Plate Wings. In: 45th AIAA Aerospace Sciences Meeting and Exhibit, 8-11 January 2007, Reno, NV.

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Open-loop active flow control is used to modify the spanwise distribution of circulation around an NACA 0012 and flat plate wing. The leading edge on both airfoils and tip regions of the NACA airfoil contain spatially localized actuators that can be independently controlled in terms of amplitude and frequency, allowing the spanwise distribution of circulation to be modified. Different orientations of the pulsed-blowing actuators were used to provide upstream, downstream, in-line with the flow, and outward span components of actuation. The actuation effectiveness was documented using force balance measurements of the lift and drag, smoke-wire visualization, surface pressure measurements and PIV velocity field measurements. Actuation with an upstream component is shown to be far more effective in reducing the separated region than actuation in the streamwise direction. Initial measurements of the change in circulation on the suction surface of the airfoil indicate that spatially localized forcing produces global changes over the wing, primarily associated with the reduction in size of the separated flow region.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Paper Paper
Colonius, T.0000-0003-0326-3909
Additional Information:© 2007 by David R. Williams. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Published Online: 18 Jun 2012. The support for this work by the U.S. Air Force Office of Scientific Research MURI (FA9550-05-1-0369) with program manager Dr. Fariba Fahroo is gratefully acknowledged. We are also appreciative of the assistance of Crystal Lybolt with support from the Illinois NASA Space Grant Consortium.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-05-1-0369
Illinois Space Grant ConsortiumUNSPECIFIED
Subject Keywords:Aerospace Systems, Operations and Life Cycle
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AIAA Paper2007-1121
Record Number:CaltechAUTHORS:20190718-165126500
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97262
Deposited By: Melissa Ray
Deposited On:23 Jul 2019 22:21
Last Modified:16 Nov 2021 17:30

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