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Measurement of Skin Friction using a Rectangular Mouthed Preston Tube

Published online by Cambridge University Press:  04 July 2016

Alan Quarmby  and
H. K. Das
Alan Quarmby
Affiliation:
The University of Manchester Institute of Science & Technology
H. K. Das
Affiliation:
The University of Manchester Institute of Science & Technology
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Summary

Measurements of skin friction were made with a set of rectangular mouthed pitot tubes of constant thickness ratio. The results gave a unique calibration between skin friction and pressure recorded by the tube when plotted after the method of Preston it the outside thickness is taken as the representative length. The calibration curve differs from that for circular Preston tubes when the effective centre of the pitot mouth lies within the sublayer.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 73 , Issue 699 , March 1969 , pp. 228 - 230
Copyright
Copyright © Royal Aeronautical Society 1969 

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References

1. Preston, J. H. The Determination of Turbulent Skin Friction by Means of Pitot Tubes. JRAeS, Vol 58, p 109, February 1954.Google Scholar
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3. Patel, V. C. Calibration of the Preston Tube and Limita tions on its Use in Pressure Gradients, J Fluid Mech, Vol 23, p 185, 1965.Google Scholar
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5. Young, A. D. and Maas, J. N. The Behaviour of a Pitot Tube in a Transverse Total Pressure Gradient, ARC R and M No 1770, 1937.Google Scholar