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Experimental control of natural perturbations in channel flow

Juillet, Fabien and McKeon, B. J. and Schmid, Peter J. (2014) Experimental control of natural perturbations in channel flow. Journal of Fluid Mechanics, 752 . pp. 296-309. ISSN 0022-1120. doi:10.1017/jfm.2014.317.

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A combined approach using system identification and feed-forward control design has been applied to experimental laminar channel flow in an effort to reduce the naturally occurring disturbance level. A simple blowing/suction strategy was capable of reducing the standard deviation of the measured sensor signal by 45 %, which markedly exceeds previously obtained results under comparable conditions. A comparable reduction could be verified over a significant streamwise extent, implying an improvement over previous, more localized disturbance control. The technique is effective, flexible, and robust, and the obtained results encourage further explorations of experimental control of convection-dominated flows.

Item Type:Article
Related URLs:
URLURL TypeDescription
McKeon, B. J.0000-0003-4220-1583
Schmid, Peter J.0000-0002-6585-8871
Additional Information:© 2014 Cambridge University Press. Received 16 April 2013; revised 28 March 2014; accepted 31 May 2014; first published online 4 July 2014. The authors wish to thank K. Rosenberg for his assistance in obtaining the measurements of the base-flow characteristics.
Subject Keywords:flow control, instability control
Record Number:CaltechAUTHORS:20140815-113320134
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Official Citation:Experimental control of natural perturbations in channel flow Fabien Juillet, B. J. McKeon and Peter J. Schmid Journal of Fluid Mechanics / Volume 752 / August 2014, pp 296 - 309 © 2014 Cambridge University Press DOI: Published online: 04 July 2014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48616
Deposited By: Ruth Sustaita
Deposited On:22 Aug 2014 06:15
Last Modified:10 Nov 2021 18:33

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