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Experiments in Fluids

, Volume 49, Issue 6, pp 1339–1348 | Cite as

Transient growth instability cancelation by a plasma actuator array

  • Ronald E. Hanson
  • Philippe Lavoie
  • Ahmed M. Naguib
  • Jonathan F. Morrison
Research Article

Abstract

This study investigates an actuation scheme that can be integrated as part of a feedback control system in the laboratory for the purpose of negating the transient growth instability in a Blasius boundary layer and delaying transition. The actuators investigated here consist of a spanwise array of symmetric plasma actuators, which are capable of generating spanwise-periodic counter-rotating vortices. Three different actuator geometries are investigated, resulting in 45, 67 and 70% reduction of the total disturbance energy produced inside the boundary layer by an array of roughness elements. It is demonstrated that the control effectiveness of the actuators can be significantly improved by optimizing the geometry of the array.

Keywords

Roughness Element Laminar Boundary Layer Plasma Actuator Transient Growth High Voltage Electrode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The financial support of NSERC (Canada), EPSRC (UK, GR/S82947/01) and the Connaught Fund of the University of Toronto is acknowledged.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Ronald E. Hanson
    • 1
  • Philippe Lavoie
    • 1
  • Ahmed M. Naguib
    • 2
  • Jonathan F. Morrison
    • 3
  1. 1.University of Toronto Institute for Aerospace StudiesTorontoCanada
  2. 2.Department of Mechanical EngineeringMichigan State UniversityEast LansingUSA
  3. 3.Department of AeronauticsImperial College LondonLondonUK

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