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Supersonic aerodynamics of a projectile with slot cavities

Published online by Cambridge University Press:  03 February 2016

A. Ibrahim  and
A. Filippone
A. Ibrahim
Affiliation:
Department of Mechanical Engineering, Military Technical College, Cairo, Egypt
A. Filippone
Affiliation:
School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
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Abstract

This paper presents the results of experimental and computational investigations on the effect of slot cavities on a supersonic projectile. Experimental work was carried out to show the effects of the slots on the drag at Mach numbers M = 1·36, 1·65, 1·83. The computational analysis was done at M = 1·36. A single configuration of the slot pattern was used with two different slot widths (0·5mm and 2·0mm). Flow features were investigated in the slotted area and at the base. The analysis presented includes the pressure distribution, the supersonic cavity flow and the effect of the slots on the overall aerodynamic drag. Unlike the case of slots at transonic speeds, the suction and blowing mechanism is not found at supersonic Mach numbers. Streamwise cavity slots cause a small base drag reduction. The reduction in total drag is modest when the width is 0·5mm. However, the experiments showed that with the wider slots (2mm) the drag actually increases at Mach numbers from 1·36 to 1·83.

Type
Research Article
Information
The Aeronautical Journal , Volume 114 , Issue 1151 , January 2010 , pp. 15 - 24
Copyright
Copyright © Royal Aeronautical Society 2010 

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References

1. Karsten, P.A., Long range artillery: The next generation, 1998, Proceedings 17th International Symposium on Ballistics, Midland, South Africa, pp 133–141.Google Scholar
2. Tanner, M., Reduction of base drag, Prog in Aerospace Sciences, 1975, 16, (4), pp 369–384.10.1016/0376-0421(75)90003-2Google Scholar
3. Fu, J. and Liang, S., Drag reduction for turbulent flow over a projectile: Part I, J Spacecraft and Rockets, January 1994, 31, (1), pp 85–92.10.2514/3.55669Google Scholar
4. Platou, A.S., Improved projectile boattial,” J Spacecraft and Rockets, Dec. 1975, 12, (12), pp. 727–;732.10.2514/3.57040Google Scholar
5. Herrin, J.L. and Dutton, J.C., Supersonic near-wake afterbody boattailing effects on axisymmetric bodies, J Spacecraft and Rockets, 1994, 31, (6), pp 1021–1028.10.2514/3.26553Google Scholar
6. Liang, S. and Fu, J., Drag reduction for turbulent flow over a projectile: Part II, J Spacecraft and Rockets, January 1994, 31, (1), pp. 93–;98.10.2514/3.26407Google Scholar
7. Hsiung, J. and Chow, C., Drag reduction of transonic projectile by porous surface, 1993, AIAA Paper 93-0417.Google Scholar
8. Hsiung, J. and Chow, C., Computed drag reduction on a projectile using porous surfaces, J Spacecraft and Rockets, May 1995, 32, (3), pp 450–455.Google Scholar
9. Liang, S. and Fu, J., Passive control method for drag reduction for transonic projectiles, 1991, AIAA Paper 91-3213-CP.Google Scholar
10. Smith, A.N., Babinsky, H., Fulker, J.L. and Ashill, P.R., Experimental investigation of transonic aerofoil shock/boundary layer interaction control using streamwise slots, 2002, Proceedings of the IUTAM Symposium, Gottingen, Germany, Kluwer Academic Publishers, Dordrecht, The Netherlands, pp 285–290.Google Scholar
11. Smith, A.N., Babinsky, H., Fulker, J.L. and Ashill, P.R., Shockwave/boundary-layer interaction control using streamwise slots in transonic flows, J Aircr, May 2004, 41, (3), pp 540–546.10.2514/1.11479Google Scholar
12. Ibrahim, A. and Filippone, A., Effect of streamwise slots on the drag of a transonic projectile, J Aircr, Nov. 2007, 44, (6), pp 1865–1875.Google Scholar
13. Kline, S.J. and McClintock, F.A., Describing uncertainties in single sample experiments, Mechanical Eng, 1953, 75, (1), pp 3–8.Google Scholar
14. Menter, F.R., Two-equation eddy-viscosity turbulence model for engineering applications, AIAA J, August 1994, 32, (8), pp 1598–1605.10.2514/3.12149Google Scholar
15. Forsyte, J.R., Hoffmann, K.A., Cummings, R.M. and Squires, K.D., Detached-eddy simulation with compressibility correction applied to a supersonic axisymmetric base flow, J Fluids Engineering, April 2002, 124, (4), pp 911–923.Google Scholar
16. Delery, J.M., Shock wave/turbulent boundary layer interaction and its control, Prog in Aerospace Sciences, 1985, 22, (4), pp 209–280.10.1016/0376-0421(85)90001-6Google Scholar