Experimental Flow Studies on Separation and Reattachment in the Vicinity of Sharp,Wedge Shaped Leading Edges at Low Reynolds Numbers

  • A. -M. Schreyer
  • W. Würz
  • E. Krämer
  • A. Talamelli
  • H. Alfredsson
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 112)


The flow field around sharp leading edges in subsonic, low Reynolds number flow is investigated experimentally. Separation occurs already at small angles of attack. Under certain conditions reattachment takes place and a separation bubble develops. As this influences the lift and drag of an airfoil decisively, the conditions leading to reattachment and the formation of a laminar boundary layer are of special interest. The influences of the Reynolds number, angle of attack and leading edge apex angle on the boundary layer properties are studied by means of hot-wire anemometry, flow visualisation techniques and measurements of the pressure distribution over the leading edge. For a small parameter range, laminar separation followed by laminar reattachment is observed.


Wind Tunnel Unmanned Aerial Vehicle Leading Edge Separation Bubble Laminar Separation Bubble 
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© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • A. -M. Schreyer
    • 1
  • W. Würz
    • 1
  • E. Krämer
    • 1
  • A. Talamelli
    • 2
  • H. Alfredsson
    • 2
  1. 1.Institut für Aerodynamik und Gasdynamik IAGUniversität StuttgartStuttgartGermany
  2. 2.Kungliga Tekniska Högskolan KTHStockholmSweden

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