Experiments in Fluids

, 55:1795 | Cite as

Flow separation control over a Gö 387 airfoil by nanosecond pulse-periodic discharge

  • Kentaro KatoEmail author
  • Christian Breitsamter
  • Shinnosuke Obi
Research Article


Airfoil flow separation control using plasma actuator driven by repetitive nanosecond pulse voltage was experimentally investigated. The pressure distribution on an airfoil surface was measured by means of a liquid manometer, which is free from electromagnetic interference of the plasma. By integrating the pressure distribution, the lift coefficient was computed and the effects of the input voltage amplitude and repetitive frequency were evaluated. The results show two different manners of the lift increment depending on the angle of attack. At the pre-stall and stall angle, the flow is steady and the lift increment does not depend on the frequency. A strong hysteresis effect is also observed, i.e., once the lift increases due to the plasma actuation, it is still increased even after the actuation stops. At the post-stall angle, the flow is unsteady and the lift increment becomes significant with actuation at frequencies related to inherent flow instabilities for the shear layer and wake, which are determined by the spectrum analysis based on hot-wire measurements. At the preference frequency ranges, there is a certain voltage amplitude depending on the angle of attack, at which the extended plasma layer results in an optimum increase of lift.


Pressure Distribution Shear Layer Lift Coefficient Voltage Amplitude Plasma Layer 
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.



This work was supported by Erasmus Mundus action 2 project “BEAM Build on Euro Asian Mobility” and also was achieved as an international internship program for COE Research Assistant of Keio University Global Center of Excellence Program “Center for Education and Research of Symbiotic, Safe and Secure System Design.” We appreciate the offers of electric devices from FID GmbH. We appreciate the specific suggestions for the flow instabilities from Dr. Kitsios. We wish to acknowledge valuable discussions with Mr. G. Correale and Dr. M. Kotsonis at Delft University of Technology. We would like to thank Dr. Y. Oyamada at Waseda University for the suggestion related to photogrammetric technique.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Kentaro Kato
    • 1
    Email author
  • Christian Breitsamter
    • 1
  • Shinnosuke Obi
    • 2
  1. 1.Lehrstuhl für Aerodynamik und StrömungsmechanikTechnische Universität MünchenGarching bei MünchenGermany
  2. 2.Department of Mechanical EngineeringKeio UniversityYokohamaJapan

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