Experimental Investigation of Laminar Separation Bubbles

Part of the Notes on Numerical Fluid Mechanics (NNFM) book series (NONUFM, volume 40)


Laminar separation bubbles play an important role in the flow about airfoils at Reynolds numbers below 3 millions in incompressible flows. Drag as well as stall behaviour can be deteriorated considerably. Designing or analysing airfoils in this flight regime, with some success, requires understanding of the flow phenomena envolved in the formation of these regions with locally separated flow. Detailed experimental studies were carried out on laminar separation bubbles that formed near the midchord of different airfoils at Reynolds numbers from 0.7 to 3 millions. Static pressure, hot wire anemometry, and flow visualisation data were acquired. The data were used to evaluate the applicability of existing separation bubble models. Some details of the materials gathered are presented in the following context.


Boundary Layer Separation Bubble Wall Distance Linear Stability Theory Airfoil Surface 
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.


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  1. [1]
    F.X. Wortmann and D. Althaus: Der Laminarwindkanal des Instituts für Aerodynamik und Gasdynamik der Technischen Hochschule Stuttgart.Google Scholar
  2. [2]
    E. Dobbinga, J.L. van Ingen and J.W. Kooi: Some research on two dimensional laminar separation bubbles. AGARD-CPP-102,1972.Google Scholar
  3. [3]
    C.Y. Liu and V.A. Sandborn: Evaluation of the sepatation properties of laminar boundary layers. The Aeronautical Quarterly,Aug. 1968, Vol.XIX.Google Scholar
  4. [4]
    Green J.E.: Two dimensional turbulent reattachment as a boundary-layer problem. AGARD CP4,Pt. I, 1966.Google Scholar
  5. [5]
    E.J. Fitzgerald and Th.J. Mueller:Measurements in a separation bubble on an airfoil using Laser Velocimetry. AIAA Journal, Vol. 28, Nr. 14, 1990.Google Scholar
  6. [6]
    LeBlanc, P., Blackwelder, R., Liebeck, R.: A Comparison between Boundary Layer Measurements in a Laminar Separation Bubble Flow and Linear Stability Theory Calculations. Department of Aerospace Engineering University of Southern California.Google Scholar
  7. [7]
    D. Althaus, W. Würz: SchluBbericht für die Deutsche Forschungsgemeinschaft über das Forschungsvorhaben: Experimentelle Untersuchung laminarer Ablöseblasen. Institutsbericht (1988).Google Scholar

Copyright information

© Springer Fachmedien Wiesbaden 1993

Authors and Affiliations

  1. 1.Institut für Aerodynamik und GasdynamikUniversität StuttgartGermany

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