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Numerical Simulations of Natural and Actuated Flow over a 3-D, Low-Aspect-Ratio Airfoil

Brès, Guillaume A. and Williams, David R. and Colonius, Tim (2010) Numerical Simulations of Natural and Actuated Flow over a 3-D, Low-Aspect-Ratio Airfoil. In: 40th Fluid Dynamics Conference and Exhibit, 28 June-1 July 2010, Chicago, IL. https://resolver.caltech.edu/CaltechAUTHORS:20190717-102319343

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Abstract

Numerical simulations of the unsteady flow over a low-aspect-ratio, low Reynolds number semi-circular planform wing are performed using Lattice Boltzmann method. The simulations exactly match the flow conditions and the detailed geometry from previous wind-tunnel experiments, including the flow actuators installed internally along the leading edge of the wing. To reproduce the pulsed-blowing actuation used in the experiment, a single pulsed square wave forcing is imposed in the simulations as a mass flow boundary condition in the actuators. Three angles of attack, with the active flow control both on and off, are investigated. For both mean and unsteady lift and drag, the numerical simulations show good agreement with the experiments. In particular, the transient increase in lift after the forcing is turned off is well captured in the simulations. Both PIV measurements and transient numerical results indicate that this behavior is associated with the advectionof large vortical structures generated by the flow actuation at the leading edge.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2010-4713DOIConference Paper
https://arc.aiaa.org/doi/10.2514/6.2010-4713PublisherConference Paper
ORCID:
AuthorORCID
Brès, Guillaume A.0000-0003-2507-8659
Colonius, Tim0000-0003-0326-3909
Additional Information:© 2010 by G.A. Brès, D.R. Williams & T. Colonius. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Published Online: 13 Nov 2012.
Subject Keywords:Fluid Dynamics
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2010-4713
Record Number:CaltechAUTHORS:20190717-102319343
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190717-102319343
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97204
Collection:CaltechAUTHORS
Deposited By: Melissa Ray
Deposited On:18 Jul 2019 16:36
Last Modified:03 Oct 2019 21:29

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