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Experimental study of turbulent boundary layer along a flat plate with linear increase of roughness height

Published online by Cambridge University Press:  04 July 2016

C. Y. Liu  and
M. Y. Huang
C. Y. Liu
Affiliation:
Chung Shan Institute of Science and Technology, TaiwanRepublic of China
M. Y. Huang
Affiliation:
Chung Shan Institute of Science and Technology, TaiwanRepublic of China
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Extract

Velocity defect law has been accepted as a universal velocity distribution for a turbulent boundary layer along a flat plate. The two necessary conditions for such a similarity to exist are not fulfilled with flat plate boundary layer having smooth or uniformly rough surfaces. Rotta has proved that a linear increase of surface roughness in the stream direction is necessary to ensure such a similarity. This note is an experimental investigation into turbulent boundary layer along a flat plate with linear increase of roughness height. It is obvious that, under such conditions, complete similarity characteristics are fulfilled.

Type
Technical notes
Information
The Aeronautical Journal , Volume 77 , Issue 748 , April 1973 , pp. 192 - 194
Copyright
Copyright © Royal Aeronautical Society 1973 

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References

1. Rotta, J. C. Turbulent boundary layer in incompressible flow. Progress in Aeronautical Sciences Vol 2, pp. 1–220, 1962.Google Scholar
2. Schlichting, H. Boundary layer theory. McGraw-Hill Book Company, Inc. 6 Edition, 1968.Google Scholar
3. Clauser, F. H. Turbulent boundary layer. Advances in Applied Mechanics, Vol 4, p. 1–51, 1956.Google Scholar