Receptivity Considerations for Cascaded Actuators Generating Tollmien-Schlichting Waves

  • Marcus Zengl
  • Ulrich Rist
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 112)


Different blowing and suction profiles were analyzed for flow control experiments for a generic blowing-and-suction actuator. The aim of this actuator is to dampen Tollmien- Schlichting (TS) waves by superimposing a wave in counterphase. It is essential to dampen only designated waves without introducing other unstable modes. Therefore, the receptivity of the TS waves to the introduced disturbances is an issue. Actuator cascades of multiple actuator elements were investigated for time-periodic forcing. Design parameters and their influence on the ability to generate TS waves without triggering unwanted waves were investigated Hereby, it was assumed that the spatial velocity profile of each actuator element is uniform.


Direct Numerical Simulation High Harmonic Phase Parameter Slot Width Receptivity Consideration 
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© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Marcus Zengl
    • 1
  • Ulrich Rist
    • 1
  1. 1.Universität Stuttgart, IAGStuttgartGermany

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