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The interaction of a wake with a turbulent boundary layer

Published online by Cambridge University Press:  04 July 2016

Zhou Ming De  and
Squire L.C.
Zhou Ming De
Affiliation:
Cambridge University Engineering Department
Squire L.C.
Affiliation:
Cambridge University Engineering Department
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Summary

In the flow over high-lift aerofoils there is a strong interaction between the wake from one element and the boundary layer on another element immediately downstream. A number of experimental investigation of these types of flow have been made but these studies do not allow the effects associated with the various parameters of the aerofoil to be seen easily. This paper presents the results of extensive measurements of mean and fluctuating quantities made in merging layers in zero and adverse pressure gradients downstream of aerofoils of various shapes. A general description of the emerging process is given and the effects of wake characteristics and pressure gradient are considered. The paper also contains a discussion of the modelling of the Reynolds shear stress in the merging layer.

Type
Research Article
Information
The Aeronautical Journal , Volume 89 , Issue 882 , February 1985 , pp. 72 - 81
Copyright
Copyright © Royal Aeronautical Society 1985 

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Footnotes

*

On leave from Nanjing Aeronautical Institute, China (October 1980 to October 1982).

References

1. Pot, P. J. A wake boundary layer mixing experiment. 2nd Symposium on turbulent shear flow, London 1979.Google Scholar
2. Pot, P. J. Measurement in a two-dimensional wake and in a two-dimensional wake merging into a boundary layer. Data report NLR TR 79003 L, 1979.Google Scholar
3. Johnston, L. J. The mixing of a two-dimensional turbulent wake and boundary layer at constant pressure. Unpublished report from Queen Mary College, London 1980.Google Scholar
4. Bario, F., Charnay, G. and Papailiou, K. D. An experiment concerning the confluence of a wake and a boundary layer. Jour of Fluids Engineering, 1982,104,18–24.Google Scholar
5. Foster, D. N., Irwin, H. P. A. H. and Williams, B. R. The two-dimensional flow around a slotted flap. ARC R & M 3681, 1971.Google Scholar
6. VanDenBerg, B.and Oskam, B.Boundarylayer measurements on a two-dimensional wing with a flap and a comparison with calculations. AGARD CP No 271,1980.Google Scholar
7. Brune, G. W. and Skavi, D. A. Experimental investigation of the confluent boundary layer of a multi-element low speed aerofoil. AIAA-83-0566,1983.Google Scholar
8. Zhou, M. D. and Squire, L. C. The interaction of a wake with a boundary layer. Data report CUED/A-Aero/TR 11,1981.Google Scholar
9. Zhou, M. D. and Squire, L.C.The interaction of a wake with a boundarylayer.Proceedings6ft IUTAMSymposiumon structure of complex turbulent shear flows, Marseille. Springer- Verlag 1983.Google Scholar
10. Head, M. R. and Vasanta RAM, V. Improved presentation of Preston tube calibration. Aero Quarterly, 1971, XXII,295–300.Google Scholar
11. Head, M. R. and Bandyopadhyay, P. New aspects of turbulent boundary layer structure. JFM, 1981,107,297–338.Google Scholar
12. Nemouchi, Z. Numerical computations of merging turbulent wakes and boundary layers. UMIST Mechanical Engineering Department Report TFD/83/8,1983.Google Scholar
13. Hinze, J. O. Turbulent flow regions with shear stress and mean velocity gradient of opposite sign. Applied Science Review, 1970, 22, 163–175.Google Scholar
14. Eskinazi, S. and Erian, F. F. Energy reversal in turbulent flows. Physics of Fluids, 1969,12,1988–1998.Google Scholar
15. Savill, A. M. and Zhou, M. D. Wake/boundary layer and wake/wakeinteractions —smokeflowvisualisationand modelling.Proceedings of 2nd Asian Congress of Fluid Mechanics. 743–752,1983.Google Scholar