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Transition Due to Roughness

Published online by Cambridge University Press:  04 July 2016

M. R. Head
M. R. Head*
Affiliation:
University of Cambridge
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Extract

It is commonly stated in the literature on laminar flow control (see, for example, ref. 1) that the important parameter controlling the height of tolerable roughness is the Reynolds number per foot, or unit Reynolds number, Vh; provided this parameter is the same in any two cases (which are closely geometrically similar) then it is assumed that the tolerable roughness height will also be similar. It is the object of the present note to point out that this is true only in very restricted circumstances and that in general the actual physical scale is also of considerable importance, as the following shows.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 69 , Issue 653 , May 1965 , pp. 344 - 345
Copyright
Copyright © Royal Aeronautical Society 1965

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References

1.Lachmann, G. V. (Ed.). Boundary Layer and Flow Control, p 933. Pergamon Press, 1961.Google Scholar