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Note on the Prediction of the Local Flow Conditions at the Crest of an Aerofoil Section in a Sonic Stream

Published online by Cambridge University Press:  04 July 2016

N. Thompson
N. Thompson*
Affiliation:
Royal Aeronautical Society
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Extract

The pressure distribution on the surface of an aerofoil section at near sonic speeds is not sensitive to small changes in free-stream Mach number, and the distribution at M0=1.0 is often referred to as the sonic-range pressure distribution. Attempts to predict this form of pressure distribution have met with some success in the past, the work of Spreiter and Alksne, using an approximate solution of the non-linear equations of transonic small-disturbance theory, being of particular note. Reference 1 demonstrated the application of this theory to a family of non-lifting, sharp-nosed aerofoils and found good agreement with experiment at free-stream Mach numbers close to unity.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 70 , Issue 663 , March 1966 , pp. 444 - 446
Copyright
Copyright © Royal Aeronautical Society 1966

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References

1. Spreiter, J. R. and Alksne, A. Y. Thin Airfoil Theory Based on Approximate Solution of the Transonic Flow Equation. NACA Report 1359, 1958 Google Scholar
2. A Method for Estimating the Pressure Distribution Between the Crest and the Trailing Edge on the Surface of an Aerofoil Section in a Sonic Stream. RAeS TDM 6511, November 1965.Google Scholar
3. Gibbings, J. C. A Correlation of Some Transonic Aerodynamic Characteristics of Two-Dimensional Symmetrical Aerofoils at Zero Incidence. ARC Report 22 744, March 1961.Google Scholar
4. Sinnott, C. S. On the Flow of a Sonic Stream Past an Airfoil Surface. Journal of Aerospace Sciences, Vol 26, No 3, March 1959.CrossRefGoogle Scholar
5. Michel, R., Marchaud, F. and Legallo, J. Influence de la Position du Maitre-Couple sur les Écoulements Transsoniques Autour de Profils a Pointes. ONERA Pub 72, 1954.Google Scholar
6. Carroll, J. B. and Anderson, G. F. Boundary Layer Effect on Local Mach number Measurements on a Circular-Arc Half Profile. Journal of the Aeronautical Sciences, Vol 23, No 6, June 1956.Google Scholar
7. Graham, W. J. and MacDonald, A. G. J. Interference Effects at Sonic Speeds for a Biconvex Aerofoil in a Wind Tunnel with Slotted Liners. Journal of the Royal Aeronautical Society, Vol 70, March 1966.Google Scholar
8. Randall, D. G. Transonic Flow over Two-Dimensional Round-Nosed Aerofoils. RAE TN Aero 2579, September 1958.Google Scholar