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Some experiments on equilibrium turbulent boundary layers in favourable pressure gradients

Published online by Cambridge University Press:  28 March 2006

H. J. Herring  and
J. F. Norbury
H. J. Herring
Affiliation:
Department of Aerospace and Mechanical Sciences, Princeton University, Princeton, N.J.
J. F. Norbury
Affiliation:
Department of Aerospace and Mechanical Sciences, Princeton University, Princeton, N.J. Present address: Department of Mechanical Engineering, University of Liverpool.
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Abstract

A wind tunnel in which an arbitrary negative pressure gradient could be developed has been built for boundary-layer studies. The effects of selected pressure gradients on boundary layers grown on one of the walls of the tunnel were studied. It was possible to obtain equilibrium boundary layers of the type first suggested by Clauser: that is, layers whose non-dimensional velocity-defect distribution is invariant along the direction of flow. The velocity-defect distributions for two such boundary layers were established, corresponding to values of Clauser's dimensionless pressure-gradient parameter β of −0·35 and −0·53. These velocity profiles are compared with the profiles predicted theoretically by Mellor & Gibson (1966). The agreement between the two is very good.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 27 , Issue 3 , 24 February 1967 , pp. 541 - 549
Copyright
© 1967 Cambridge University Press

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References

Clauser, F. 1954 Turbulent boundary layers in adverse pressure gradients J. Aero. Sci. 21, 91–108.Google Scholar
Clauser, F. 1956 The turbulent boundary layer Adv. Appl. Mech. 4, 1–51.Google Scholar
Mellor, G. L. & Gibson, D. M. 1966 Equilibrium turbulent boundary layers J. Fluid Mech. 24, 225–253.Google Scholar
Stratford, B. S. 1959 An experimental flow with zero skin friction throughout its region of pressure rise J. Fluid Mech. 5, 17–35.Google Scholar