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Displacement Effects on Pitot Tubes with Rectangular Mouths

Published online by Cambridge University Press:  07 June 2016

Alan Quarmby  and
H. K. Das
Alan Quarmby
Affiliation:
Faculty of Technology, University of Manchester
H. K. Das
Affiliation:
Faculty of Technology, University of Manchester
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Summary

The displacement effects on a set of five rectangular mouthed pitot tubes of a constant thickness ratio, 0-6, were investigated in fully developed turbulent flow in a plain tube. The results show that the displacement due to shear only, δ1, is given by δ1/b=0.19, where b is the outside thickness of the pitot tube. The additional wall effect is found to have a dependence on Reynolds number or, equivalently, wall shear within the range investigated of 27 500 < Rev < 58 300. The wall effect results may be presented as a single curve, however, if consideration is given to the distance up to which the wall effect is present.

Type
Research Article
Information
Aeronautical Quarterly , Volume 20 , Issue 2 , May 1969 , pp. 129 - 139
Copyright
Copyright © Royal Aeronautical Society. 1969

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References

1. Macmillan, F. A. Experiments on pitot tubes in shear flow. ARC R & M 3028, 1957.Google Scholar
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4. Quarmby, Alan. On the use of the Preston tube in concentric annuli. Journal of the Royal Aeronautical Society, Vol. 71, p. 47,1967.Google Scholar