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Premature boundary layer transition caused by surface static pressure tappings

Published online by Cambridge University Press:  04 July 2016

P. E. Roach  and
J. T. Turner
P. E. Roach
Affiliation:
Advanced Research Laboratory, Rolls-Royce plc, Derby
J. T. Turner
Affiliation:
Department of Engineering, University of Manchester
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Summary

Experiments have been performed to study the influence of multiple surface static pressure tappings on transition of the boundary layer on a circular cylinder in cross-flow. A wide range of tapping and cylinder dimensions have been examined to demonstrate that the tappings can act in the same way as trip wires or other surface roughness to reduce the Reynolds number at which transition occurs. Hence, the pressure distribution around the cylinder may be influenced by the presence of the tappings, leading to incorrect measurements. Examination of the data has resulted in a correlation which should make it possible to avoid this tapping/boundary layer interaction in future experiments involving similar cylindrical bodies.

Type
Research Article
Information
The Aeronautical Journal , Volume 92 , Issue 912 , February 1988 , pp. 63 - 68
Copyright
Copyright © Royal Aeronautical Society 1988 

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