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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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References

1. Tani, I., Boundary layer transition. Ann Rev Fluid Mech, 1969. 1, 169–196.Google Scholar
2. Gibbings, J. C., Goksel, O. T. and Hall, D. J. The influence of roughness trips upon boundary layer transition. Part 1. Characteristics of wire trips. Aeronaut J, 1986, 90, (898), 289–301.Google Scholar
3. Fage, A. and Warsap, J. H. The effects of turbulence and surface roughness on the drag of a circular cylinder. ARC R&M 1283, 1930.Google Scholar
4. James, D. F. and Truong, O. S. Wind load on a cylinder with spanwise. protrusion. Proc ASCE, 1972. J Eng Mech, 98, 1573–1589.Google Scholar
5. Achenbach, E. Influence of surface roughness on the cross-flow around a circular cylinder. J Fluid Mech, 1971, 46, 321–335.Google Scholar
6. Somers, D. M., Stack, J. P. and Harvey, W. D. Influence of surface static pressure orifices on boundary layer transition. NASA TM 84492, 1982.Google Scholar
7. Turner, J. T. and Williams, K. J. The effect of spanwise velocity distribution on the drag of short struts. Symposium on Internal Flows. 1971, University of Salford, paper 31.Google Scholar
8. Williams, K. J. The influence of spanwise velocity shear on the flow around short circular struts. PhD Thesis, University of Manchester, 1972.Google Scholar
9. Mendis, W. W. K. L. The effect of a pressure gradient on the flow around short struts. MSc Thesis, University of Manchester, 1978.Google Scholar
10. Roach, P. E. The aerodynamic performance of short struts immersed in end-wall boundary layers. PhD Thesis, University of Manchester, 1982.Google Scholar
11. Roach, P. E. and Turner, J. T. Secondary loss generation by gas turbine support struts, Int J Heat Fluid Flow, 1985, 6, (2), 79–88.Google Scholar
12. Shaw, R. The influence of hole dimensions on static pressure measurements. J Fluid Mech, 1960, 7, 550–564.Google Scholar
13. Bearman, P. W. The flow around a circular cylinder in the critical Reynolds number regime. NPL Aero Report 1273. 1968.Google Scholar
14. Roshko, A. Experiments on the flow past a circular cylinder at very high Reynolds numbers. J Fluid Mech, 1961, 10, 345–356.Google Scholar