Control and identification of turbulent boundary layer separation

Avi Seifert, Latunia Pack Melton

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

Effective delay of turbulent boundary layer separation could be achieved via closed-loop control. Constructing such a system requires that sensor data be processed, real-time, and fed into the controller to determine the output. Current methods for detection of turbulent boundary layer separation are lacking the capability of localized, fast and reliable identification of the boundary layer state. A method is proposed for shorttime FFT processing of time series, measured by hot-film sensors, with the purpose of identifying the alternation of the balance between small and large scales as the boundary layer separates, favoring the large scales. The method has been validated by comparison to other criteria of separation detection and over a range of baseline and controlled flow conditions on a "simplified" high-lift system, incorporating active flow control.

Original languageEnglish
Title of host publicationIUTAM Symposium on One Hundred Years of Boundary Layer Research
Subtitle of host publicationProceedings of the IUTAM Symposium Held at DLR-Gottingen, Germany, August 12-14, 2004
PublisherSpringer Verlag
Pages199-208
Number of pages10
ISBN (Electronic)978-1-4020-4150-1
ISBN (Print)9781402041495
DOIs
StatePublished - 2006

Publication series

NameSolid Mechanics and its Applications
Volume129
ISSN (Print)0925-0042

Keywords

  • Active flow control
  • Actuators
  • Boundary layer
  • Closed-loop
  • High-lift
  • Hot-films
  • Sensors
  • Separation
  • Turbulent

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