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Calculation of tunnel wall interference from wall-pressure measurements

Published online by Cambridge University Press:  04 July 2016

P. R. Ashill  and
R. F. A. Keating
P. R. Ashill
Affiliation:
Aerodynamics Department , Royal Aircraft Establishment, Bedford
R. F. A. Keating
Affiliation:
Aerodynamics Department , Royal Aircraft Establishment, Bedford
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Summary

A method is described for calculating wall interference in solid-wall wind tunnels from measurements of static pressures at the walls. Since it does not require a simulation of the model flow, the technique is particularly suited to determining wall interference for complex flows such as those over VSTOL aircraft, helicopters and bluff shapes (e.g. cars and trucks). An experimental evaluation shows that the method gives wall-induced velocities which are in good agreement with those of existing methods in cases where these techniques are valid, and illustrates its effectiveness for inclined jets which are not readily modelled.

Type
Research Article
Information
The Aeronautical Journal , Volume 92 , Issue 911 , January 1988 , pp. 36 - 53
Copyright
Copyright © Royal Aeronautical Society 1988 

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References

1. Garner, H. C., Rogers, E. W. E., Acum, W. E. A. and Maskell, E. C. Subsonic wind-tunnel wall corrections. AGARDograph 109, 1966.Google Scholar
2. Maskell, E. C. A theory of the blockage effects on bluff bodies and stalled wings in a closed wind tunnel. ARC R&M 3400, 1963.Google Scholar
3. Hackett, J. Living with solid-walled wind tunnels. AIAA-82- 0583, 1982.Google Scholar
4. Capelier, C., Chevallier, J. P. and Bouniol, F. Nouvelle methode de correction des effets de parois en courant plan. Rech Aerosp, 1977, (1), 1–11.Google Scholar
5. Mokry, M. Subsonic wall interference corrections for finite length test sections using boundary pressure measurements. AGARD-CP-335, 1982, Paper 10.Google Scholar
6. Smith, J. A method for 2D wall interference on an aerofoil from pressure distributions near the walls and on the model. NLR Technical Report 81016U, 1981.Google Scholar
7. Ashill, P. R. and Weeks, D. J. A method for determining wall interference corrections in solid-wall tunnels from measurements of static pressure at the walls. AGARD-CP-335, 1982, Paper 1.Google Scholar
8. Lo, C. F. Tunnel interference assessment by boundary measurements. AIAA J, 1978, 16, (4), 411–413.Google Scholar
9. Goodyer, M. J. and Wolf, S. W. D. The development of a self streamlining flexible walled transonic test section. AIAA- 80-0440-CP. 1980.Google Scholar
10. Judd, M., Wolf, S. W. D. and Goodyer, M. J. Analytical work in support of the design and operation of two-dimensional self streamlining test sections. NASA CR-145019, 1976.Google Scholar
11. Ashill, P. R. and Keating, R. F. A. Calculation of tunnel wall interference from wall-pressure measurements. RAE Technical Report 85086, 1985.Google Scholar
12. Fail, R., Lawford, J. A. and Eyre, R. C. W. Low-speed experiments on the wake characteristics of flat plates normal to an air stream. ARC R & M 3120, 1957.Google Scholar
13. Hoerner, S. F. Fluid-dynamic drag (2nd edition). Published by the author, 1965.Google Scholar
14. East, L. F. and Hoxey, R. F. Low-speed three-dimensional boundary layer data. Parts 1 and 2. ARC R & M 3653, 1969.Google Scholar
15. Ashill, P. R. RAE unpublished Report.Google Scholar
16. Maskell, E. C. and Spence, D. A. A theory of the jet flap in three dimensions. Proc R Soc, Series A, 1959, 251, 407–425.Google Scholar
17. Robinson, A. and Laurmann, J. A. Wing theory. Cambridge University Press, 1956.Google Scholar
18. Rebstock, R. Numerical methods for adapting wind-tunnel walls. Institut für Luft-und Raumfahrt Technische Universität, Berlin, ILR Mitt 144, 1984.Google Scholar