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Active Control of Separation Bubbles Exploiting Laminar Baseflow Instabilities

[+] Author Affiliations
Kai Augustin, Ulrich Rist, Siegfried Wagner

Universität Stuttgart, Stuttgart, Germany

Paper No. FEDSM2002-31047, pp. 1375-1380; 6 pages
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME


In the present paper laminar separation bubbles are investigated by means of direct numerical simulations with respect to steady and unsteady 2D and 3D Tollmien-Schlichting (TS) like boundary layer disturbances. The specific influence of several disturbance modes on the size and shape of the laminar separation bubble are considered to allow for an effective reduction of the region of separated flow. Based on these results a criterion to detect the extension of the bubble is derived which is a suitable input for a controller.

Copyright © 2002 by ASME



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