Applications: Boundary Layers

  • Markus Raffel
  • Christian E. Willert
  • Fulvio Scarano
  • Christian J. Kähler
  • Steven T. Wereley
  • Jürgen Kompenhans
Chapter

Abstract

The following two experiments have been performed in the second half of the 1990s’ in the DLR low turbulence wind tunnel (TUG), which is of an Eiffel type. Screens in the settling chamber and a high contraction ratio of 15:1 lead to a low turbulence level in the test section (cross section \(0.3 \times 1.5\,\text {m}^2\)). The basic turbulence level in the test section of the TUG of \(Tu= 0.06\%\) (measured by means of a hot wire) allows the investigation of acoustically exited transition from laminar to turbulent flow as well as turbulent boundary layers that develop in the relatively long test section. The flow was seeded in the settling chamber upstream of the screens used to reduce the turbulence of the wind tunnel flow.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Markus Raffel
    • 1
  • Christian E. Willert
    • 2
  • Fulvio Scarano
    • 3
  • Christian J. Kähler
    • 4
  • Steven T. Wereley
    • 5
  • Jürgen Kompenhans
    • 1
  1. 1. Institut für Aerodynamik und StrömungstechnikDeutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)GöttingenGermany
  2. 2. Institut für AntriebstechnikDeutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)KölnGermany
  3. 3.Department of Aerospace EngineeringDelft University of TechnologyDelftThe Netherlands
  4. 4.Institut für Strömungsmechanik und AerodynamikUniversität der Bundeswehr MünchenNeubibergGermany
  5. 5.Department of Mechanical Engineering, Birck Nanotech CenterPurdue UniversityWest LafayetteUSA

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