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The Effect of Nose Blunting on the Wave Drag of Ogive Forebodies

Published online by Cambridge University Press:  07 June 2016

R. Partington  and
T.J. Baker
R. Partington
Affiliation:
Engineering Sciences Data Unit
T.J. Baker
Affiliation:
Aircraft Research Association
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Summary

A theoretical method is used to predict the surface pressure distribution and drag-rise characteristics of blunted ogive forebodies. The results confirm the observation that a moderate degree of nose blunting can reduce wave drag relative to that of a pointed body of the same fineness ratio. An analysis of the theoretical data provides a simple explanation of this phenomenon.

Type
Research Article
Information
Aeronautical Quarterly , Volume 33 , Issue 3 , August 1982 , pp. 258 - 270
Copyright
Copyright © Royal Aeronautical Society. 1982

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References

1 South, J.C. and Jameson, A. Relaxation solutions for inviscid axisymmetric transonic flow over blunt or pointed bodies. Proceedings of Computational Fluid Dynamics Conference, Palm Springs, pp 8-17, AIAA, New York, 1973 Google Scholar
2 Baker, T.J. and Ogle, F.A. A computer program to compute transonic flow over an axisymmetric solid body. ARA Memo No. 197, 1977 Google Scholar
3 Walchner, O. Wind tunnel measurements on projectiles. AVA Monograph, MAP Volkenrode, R&T 999, August 1948 Google Scholar
4 Perkins, E.W., Jorgensen, L.H. and Sommer, S.C. Investigation of the drag of various axially symmetric nose shapes of fineness ratio 3 for Mach numbers from 1.24 to 7.4. NACA Rep. 1386, 1958 Google Scholar
5 Pugh, P.G. and Ward, L.C. Drag estimation for simple forebody shapes. NPL Aero Rep. 1304, October 1969 Google Scholar
6 Pugh, P.G., Ward, L.C. and Peto, J.W. A programme of experiments to investigate the transonic drag of blunted forebodies. RAE Tech. Memo. Aero 1407, April 1972 Google Scholar
7 Ward, L.C. Force measurements at transonic speeds on axisymmetric forebodies to determine the effects of bluntness. RAE tech. Rep. 76088, July 1976 Google Scholar
8 Ward, L.C. Force measurements on three blunt axisymmetric forebodies at transonic speeds. RAE tech. Rep. 76154, 1976 Google Scholar
9 Ward, L.C. Experimental transonic pressure distributions and drag-rise Mach numbers for blunt forebodies and a comparison with theoretical estimates. RAE tech. Rep. 77145, September 1977 Google Scholar
10 Ward, L.C. Force measurements on ten axisymmetric forebodies showing the effects of nose blunting at transonic and supersonic Mach numbers. RAE tech. Rep. 78093, August 1978 Google Scholar
11 Ward, L.C. Force measurements on three spherically blunted tangent ogive forebodies at transonic speeds and a comparison with theory of the zero-incidence drag of these and other forebodies. RAE tech. Rep. 79068, June 1979 Google Scholar
12 ESDU Forebodies of fineness ratio 1.0, 1.5 and 2.0 having low values of wave drag coefficient at transonic speeds. ESDU T.D. Memo. 79004, June 1979 Google Scholar
13 ESDU Axial pressure coefficient distributions for fore- bodies of fineness ratio 1.0, 1.5 and 2.0 at zero incidence in transonic flow. ESDU T.D. Memo. 80008, June 1980 Google Scholar
14 Green, J.E., Weeks, D.J. and Brooman, J.W.F. Prediction of turbulent boundary layers and wakes in compressible flow by a lag-entrainment method. ARC R&M No. 3791, 1973 Google Scholar