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Experimental Investigation of a Turbulent Boundary Layer Subject to an Adverse Pressure Gradient at \(Re_{\theta }\) up to 10000 Using Large-Scale and Long-Range Microscopic Particle Imaging

  • Tobias KnoppEmail author
  • Nicolas A. Buchmann
  • Daniel Schanz
  • Christian Cierpka
  • Rainer Hain
  • Andreas Schröder
  • Christian J. Kähler
Conference paper
Part of the ERCOFTAC Series book series (ERCO, volume 23)

Abstract

We present an experimental investigation and data analysis of a turbulent boundary layer flow at a significant adverse pressure gradient for two Reynolds numbers \(Re_\theta =6200\) and \(Re_\theta =8000\). We perform detailed multi-resolution measurements by combining large-scale and long-range microscopic particle imaging. We investigate scaling laws for the mean velocity and for the total shear stress in the inner layer. In the inner part of the inner layer the mean velocity can be fitted by a log-law. In the outer part a modified log-law provides a good fit, which depends on the pressure gradient parameter and on a parameter for the mean inertial effects. Emphasis is on the Reynolds number effects on the mean velocity and shear stress.

Keywords

Turbulent Boundary Layer Adverse Pressure Gradient Particle Tracking Velocimetry Total Shear Stress Turbulent Boundary Layer Flow 
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.

Notes

Acknowledgments

The authors are grateful to Prof. Skare for providing his data. The authors are also grateful to Profs. Rossow, Radespiel, Nagib and Herwig and to Drs. B. Eisfeld, A. Krumbein and D. Schwamborn for valuable discussions and suggestions.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Tobias Knopp
    • 1
    Email author
  • Nicolas A. Buchmann
    • 2
  • Daniel Schanz
    • 1
  • Christian Cierpka
    • 2
  • Rainer Hain
    • 2
  • Andreas Schröder
    • 1
  • Christian J. Kähler
    • 2
  1. 1.Institute of Aerodynamics and Flow TechnologyDLR (German Aerospace Center)GottingenGermany
  2. 2.Institute for Fluid Mechanics and AerodynamicsUniversität der Bundeswehr MünchenNeubibergGermany

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