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Experiment on Turbulent Boundary Layers on a Concave Wall

Published online by Cambridge University Press:  07 June 2016

Ronald M C So  and
George L Mellor
Ronald M C So
Affiliation:
Geophysical Fluid Dynamics Program, Rutgers University
George L Mellor
Affiliation:
Department of Aerospace and Mechanical Sciences, Princeton University
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Summary

The present experiment describes the behaviour of a turbulent boundary layer on a concave wall. At the onset of curvature there appears a fairly coherent wavelike transverse profile of mean velocity. This disturbance might be interpreted as a kind of large scale Taylor-Görtler type instability superimposed on a conventional turbulent boundary layer; further downstream the coherence degenerates as the turbulence level increases. Boundary-layer profile measurements were made at positions of maxima and minima of transverse profiles of (U-component) mean velocity. The boundary layer at the minima positions is found to be twice as thick as that at the maxima positions. Also, turbulent intensities inside the boundary layer are substantially increased as a result of the concave curvature of the surface.

Type
Research Article
Information
Aeronautical Quarterly , Volume 26 , Issue 1 , February 1975 , pp. 25 - 40
Copyright
Copyright © Royal Aeronautical Society. 1975

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