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Published August 2014 | Published
Journal Article Open

Experimental control of natural perturbations in channel flow


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.

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.

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Published - S0022112014003176a.pdf


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August 20, 2023
August 20, 2023