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On the Use of the Preston Tube in Concentric Annuli

Published online by Cambridge University Press:  04 July 2016

Alan Quarmby
Alan Quarmby*
Affiliation:
Faculty of Technology, University of Manchester
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Extract

Experimental results are presented of the measurement of skin friction in fully developed turbulent flow in concentric annuli using Preston tubes situated on the inner and outer annular surfaces. Both Preston's calibration and Patel's calibration were used to evaluate the results. It was found that the latter gave excellent results. Several radius ratios were investigated with a reasonable range of the annulus Reynolds number. The good agreement was not affected by radius ratio or smallness of core tube within the range of these parameters investigated here.

Information

Type
Technical Notes
Information
The Aeronautical Journal , Volume 71 , Issue 673 , January 1967 , pp. 47 - 49
Copyright
Copyright © Royal Aeronautical Society 1967

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References

1.Preston, J. H.The Determination of Turbulent Skin Friction by Means of Pitot Tubes. Journal of the Royal Aeronautical Society, Vol. 58, p 109, 1954.Google Scholar
2.Patel, V. C.Calibration of the Preston Tube and Limitations on its Use in Pressure Gradients. Jnl Fluid Mech, Vol 23, 1, 1965.Google Scholar
3.Head, M. R. and Rechenberg, I.The Preston Tube as a Means of Measuring Skin Friction. Jnl Fluid Mech, Vol 14, 1, 1962.Google Scholar
4.Bradshaw, P. and Gregory, N. The Determination of Local Skin Friction from Observations in the Viscous Sublayer. ARC R & M No 3202, 1959.Google Scholar