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Numerical Simulations of the Transient Flow Response of a 3D, Low-Aspect-Ratio Wing to Pulsed Actuation

Brès, Guillaume A. and Fares, Ehab and Williams, David R. and Colonius, Tim (2011) Numerical Simulations of the Transient Flow Response of a 3D, Low-Aspect-Ratio Wing to Pulsed Actuation. In: 41st AIAA Fluid Dynamics Conference and Exhibit, 27-30 June 2011, Honolulu, HI.

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Numerical simulations of the natural and actuated unsteady flow over a three-dimensional low-aspect ratio wing are performed using Lattice Boltzmann method. The LBM simulations match the flow conditions and the detailed wing geometry from previous experiments, including the actuators that are installed internally along the leading edge of the wing. The present study focuses on the transient lift response to short-duration square-wave actuation, for the wing in a uniform flow at five different angles of attack. Overall, both mean and unsteady numerical results show good agreement with the experimental data, in particular at the post-stall angle of attack 19°, where the maximum lift enhancement occurs. At that angle of attack, the effects of the actuation strength and duration are investigated. In general, the lift response to a single pulse increases with increasing actuator mass-flow rate and pulse duration.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Paper Paper
Brès, Guillaume A.0000-0003-2507-8659
Colonius, Tim0000-0003-0326-3909
Additional Information:© 2011 by G. A. Brès, E. Fares, D. R. Williams & T. Colonius. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Published Online: 14 Jun 2012.
Subject Keywords:Fluid Dynamics
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Other Numbering System NameOther Numbering System ID
AIAA Paper2011-3440
Record Number:CaltechAUTHORS:20190717-102319521
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97206
Deposited By: Melissa Ray
Deposited On:18 Jul 2019 16:34
Last Modified:16 Nov 2021 17:29

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