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A new method for the evaluation of slotted wind tunnel interference parameters applicable to subsonic oscillatory tests

Published online by Cambridge University Press:  04 July 2016

R. A. Streather
R. A. Streather*
Affiliation:
Department of Mechanical Engineering, Lanchester Polytechnic, Coventry
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Extract

Until a few years ago it was the practice to neglect lift interference on oscillatory model tests in high-speed subsonic wind tunnels, whatever the working section configuration. However, in 1960 Bratt and Wight discovered a large interference effect on the pitch damping derivative of an M-wing measured in the slotted working section of the 25 in x 20 in tunnel at the National Physical Laboratory. In 1964 Wight reviewed a number of oscillatory tests and showed that in many cases there were significant interference effects on both stiffness and damping derivatives when measured in slotted working sections.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 76 , Issue 739 , July 1972 , pp. 443 - 447
Copyright
Copyright © Royal Aeronautical Society 1972 

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References

1. Bratt, J. B. and Wight, K. C. Measurements of pitching oscillation derivatives at subsonic and transonic speeds for an M-wing. Interim report. ARC 21 661. February 1960.Google Scholar
2. WightK, C. K, C. A review of slotted-wall wind-tunnel interference effects on oscillating models in subsonic and transonic flows. Journal of the Royal Aeronautical Society, Vol 68, pp. 670–674. October 1964.Google Scholar
3. Garner, H. C, Moore, A. W. and Wight, K. C. The theory of interference effects on dynamic measurements in slotted-wall tunnels at subsonic speeds and comparisons with experiment. ARC, R and M No 3500. 1968.Google Scholar
4. Goodman, T. R. The upwash correction for an oscillating wing in a wind tunnel. J. Aero, Sci., Vol 20, pp. 383–386, 406. 1953.Google Scholar
5. Davis, D. D. and Moore, D. Analytical study of block age and lift-interference corrections for slotted tunnels obtained by the substitution of an equivalent homogeneous boundary for the discrete slots. NACA RM L53E07b (NACA/TIB/3792). June 1953.Google Scholar
6. Holder, D. R. Upwash interference on wings of finite span in a rectangular wind tunnel with closed side walls and porous-slotted floor and roof. ARC, R and M 3395. November 1963.Google Scholar
7. Rushton, K. R. and Laing, Lucy M. Finite difference solutions for an unsteady interference parameter in slotted wind tunnels. Department of Civil Engg. Report, University of Birmingham. October 1968.Google Scholar
8. Streather, R. A. Ventilated wall interference on large wind-tunnel models in oscillatory motion. Thesis submitted for the degree of Doctor of Philosophy, University of Southampton. May 1969.Google Scholar
9. Rogers, E. W. E. Subsonic wind-tunnel wall corrections, (Ed. Garner, H. C.) Chapter 6. AGARD 109. October 1966.Google Scholar