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Lock-On to a High-Lift State with Oscillatory Forcing in a Three-Dimensional Wake Flow

Taira, Kunihiko and Rowley, Clarence W. and Colonius, Tim (2010) Lock-On to a High-Lift State with Oscillatory Forcing in a Three-Dimensional Wake Flow. In: Active Flow Control II. Notes on Numerical Fluid Mechanics and Multidisciplinary Design. No.108. Springer , Berlin, pp. 81-93. ISBN 978-3-642-11734-3. https://resolver.caltech.edu/CaltechAUTHORS:20190214-083422063

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Abstract

Flow control is applied to a three-dimensional post-stall flow around a rectangular low-aspect-ratio wing. Steady actuation is used to examine effective flow control setups that modify the vortex dynamics in the wake and achieve increase in lift. For one of the setups, oscillatory forcing is then used to examine the influence of actuation frequency. It is found that sinusoidal actuation requires less momentum to the flow field to achieve lift increase compared to steady momentum injection. There are two observed ranges of forcing frequency at which the flow locks onto period-one and period-two high-lift states. Discussions of the ongoing work on stabilizing separated flow about these periodic high-lift states are offered.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/978-3-642-11735-0_6DOIArticle
ORCID:
AuthorORCID
Taira, Kunihiko0000-0002-3762-8075
Rowley, Clarence W.0000-0002-9099-5739
Colonius, Tim0000-0003-0326-3909
Additional Information:© 2010 Springer-Verlag Berlin Heidelberg. This work was supported by the US Air Force Office of Scientific Research (FA9550-05-1-0369 and FA9550-07-1-0127) with some of the computations made possible by the US Department of Defense High Performance Computing Modernization Program. The authors thank Professor Philip Holmes and Professor David Williams for enlightening discussions.
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-05-1-0369
Air Force Office of Scientific Research (AFOSR)FA9550-07-1-0127
Subject Keywords:Periodic Orbit; Oscillatory Force; Aerodynamic Performance; Vortex Dynamic; Immerse Boundary Method
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Issue or Number:108
Record Number:CaltechAUTHORS:20190214-083422063
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190214-083422063
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92922
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:14 Feb 2019 17:54
Last Modified:09 Mar 2020 13:19

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