Influence of Strouhal Number on the Structure of Flat Plate Turbulent Boundary Layer

  • J. Cousteix
  • J. Javelle
  • R. Houdeville
Conference paper


The development of an oscillating turbulent boundary layer is studied along a flat plate. The Strouhal number, based on a fictitious origin of the boundary layer, varies from 1.5 to 18. Systematic measurements of the velocity profiles are carried out and are presented in the form of the harmonic analysis of the velocity, as well as of the displacement thickness. It is shown that any quantity, for example the phase and the amplitude of the displacement thickness, oscillates as the Strouhal number increases. The period of this oscillation can be correctly estimated from a small perturbation development of the Von Kàrmàn momentum integral equation.

The evolution of the phase of velocity profiles near the wall is carefully examined. An estimation of the wall shear stress is deduced from the law of the wall, and is compared to direct measurements obtained with a skin friction gauge.

The evolution in time of the u-component of the kinetic energy of turbulence and of the correlation coefficient, are presented in a typical case.


Wall Shear Stress Skin Friction Turbulent Boundary Layer Strouhal Number Displacement Thickness 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1982

Authors and Affiliations

  • J. Cousteix
    • 1
  • J. Javelle
    • 1
  • R. Houdeville
    • 1
  1. 1.Aerothermodynamics Department ONERA/CERTF-Toulouse CedexFrance

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