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On the Effective “Length” of Two-Dimensional Contracting Ducts

Published online by Cambridge University Press:  04 July 2016

J. C. Gibbings
J. C. Gibbings*
Affiliation:
Sub-Department of Fluid Mechanics, University of Liverpool
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Extract

The note by W. T. F. Lau upon the effective “length” of two-dimensional contracting ducts has raised further points of interest.

Lau's paper presents three different criteria which can control a contraction length. Of these three, the second and third, that respectively are based upon the approach of the centre-line velocity to its asymptotic value and upon the approach of the flow to uniformity, were compared in ref. 1. The first criterion that is based upon the approach of the boundary slope to zero is not in general identical with the second.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 70 , Issue 666 , June 1966 , pp. 676
Copyright
Copyright © Royal Aeronautical Society 1966

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References

1. Gibbings, J. C. The Choice of a Hodograph Boundary for Contracting Ducts. Journal of the Royal Aeronautical Society, Vol. 68, No. 642, June 1964.Google Scholar
2. Gibbings, J. C. Flow in Contracting Ducts. AIAA Journal, Vol. 2, No. 1, January 1964.CrossRefGoogle Scholar