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Oscillatory Control and the Effects of Actuation Frequency on a Wall-Mounted Hump

Franck, Jennifer and Colonius, Tim (2009) Oscillatory Control and the Effects of Actuation Frequency on a Wall-Mounted Hump. In: 39th AIAA Fluid Dynamics Conference, 22–25 June 2009, San Antonio, TX.

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A large eddy simulation (LES) is used to explore the effects of high frequency actuation on a wall-mounted hump geometry. Low frequency forcing at F^+ ~ O(1) has been shown to increase entrainment through regular shedding of large-scale structures. Using a LES technique previously validated on the baseline and controlled flow over the wall-mounted hump geometry, the effectiveness of high frequency actuation is explored and compared with previous investigations. It is found that the high frequency actuation does not produce distinct vortical structures at the actuation frequency. The resulting mean flow is relatively unaltered by the application of high frequency actuation, although the local flow surrounding the actuation location is slightly modified.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
Colonius, Tim0000-0003-0326-3909
Additional Information:© 2009 by Jennifer Franck and Tim Colonius. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. This work was supported by a National Science Foundation Graduate Student Fellowship and the US Air Force Office of Scientific Research grant FA9550-05-1-0369.
Funding AgencyGrant Number
NSF Graduate Research FellowshipUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)FA9550-05-1-0369
Subject Keywords:Fluid Dynamics
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Other Numbering System NameOther Numbering System ID
AIAA Paper2009-4019
Record Number:CaltechAUTHORS:20190717-102318572
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97199
Deposited By: Melissa Ray
Deposited On:18 Jul 2019 16:41
Last Modified:16 Nov 2021 17:29

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