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Inverse Technique for Vortex Imaging and Its Application to Feedback Flow Control

Suzuki, Takao and Colonius, Tim and MacMartin, Douglas G. (2003) Inverse Technique for Vortex Imaging and Its Application to Feedback Flow Control. In: 33rd AIAA Fluid Dynamics Conference and Exhibit, 23-26 June 2003, Orlando, FL.

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A simple vortex imaging algorithm using a least square method is proposed for feedback flow control. The position and the circulation of a vortex convected in a channel are identified from the time history of pressure at a limited number of points on the wall. The capabilities of the algorithm are demonstrated using two-dimensional direct numerical simulations. A few observer points on one side of the wall are sufficient to detect the position and the circulation of a compact vortex to a reasonable degree of accuracy. This inverse algorithm is introduced to feedback separation control for a diffuser flow. The algorithm is modified for a curved channel, and the so-called "estimator-corrector" and "fast algorithm" are applied to reduce the uncertainty of prediction with less computational time. The DNS results demonstrate that the feedback control using the inverse technique can enhance the robustness against unsteady disturbances and lessen stagnation pressure loss.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Paper Paper
Colonius, Tim0000-0003-0326-3909
MacMartin, Douglas G.0000-0003-1987-9417
Additional Information:© 2003 by Takao Suzuki, Tim Colonius, and Douglas G. MacMartin. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Published Online: 25 Jun 2012. We appreciate Prof. Richard Murray for an idea of the estimator-corrector and Mr. Kazuo Sone for generating several files. The work on inverse algorithms described here was supported by DARPA (Defense Advanced Research Projects Agency) program (contract number F49620-00-C-0035).
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)F49620-00-C-0035
Subject Keywords:Fluid Dynamics
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Other Numbering System NameOther Numbering System ID
AIAA Paper2003-4260
Record Number:CaltechAUTHORS:20190718-165127116
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97269
Deposited By: Melissa Ray
Deposited On:24 Jul 2019 20:09
Last Modified:16 Nov 2021 17:30

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