Resolvent-based control of streaks in boundary layers

Petrônio A.S. Nogueira, André V.G. Cavalieri, Ardeshir Hanifi, Dan S. Henningson

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

In the present work, we investigate efficient placement of sensors and actuators for closed-loop control of boundary-layer flows. The focus of this work is on the transitional flow cases where perturbation field is dominated by streaks. This is done using a reduced-order model based on resolvent analysis, an approach that also allows us to analyse the sensitivity of the flow response to control. A numerical sensitivity analysis was performed in this first approach, leading to conclusions about best choices of velocity components to be sensed and directions to be forced. Afterwards, we compared the performance between gaussian and shear sensors at the wall, focusing on the damping of the first resolvent gain using these devices. We close the work with the analysis of a plasma actuator, a configuration closer to standard choices for this kind of problem in both simulations and experiments.

Original languageEnglish
Title of host publication31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018
PublisherInternational Council of the Aeronautical Sciences
ISBN (Electronic)9783932182884
Publication statusPublished - 2018
Externally publishedYes
EventCongress of the International Council of Aeronautical Sciences 2018 - Belo Horizonte, Brazil
Duration: 9 Sep 201814 Sep 2018
Conference number: 31st

Conference

ConferenceCongress of the International Council of Aeronautical Sciences 2018
Abbreviated titleICAS 2018
CountryBrazil
CityBelo Horizonte
Period9/09/1814/09/18

Keywords

  • Control
  • Transition
  • Turbulence

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