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Pressure measurements over a hemisphere-cylinder body attached with a forward facing spike

Published online by Cambridge University Press:  27 January 2016

R. Kalimuthu ,
R. C. Mehta  and
E. Rathakrishnan
R. Kalimuthu
Affiliation:
Vikram Sarabhai Space Centre, Trivandrum, India
R. C. Mehta*
Affiliation:
Noorul Islam University, Kumaracoil, Thacklay, India
E. Rathakrishnan
Affiliation:
Indian Institute of Technology, Kanpur, India
*
[email protected]
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Abstract

The present paper presents oil flow visualisations and pressure measurements over a hemisphere-cylinder body attached with a forward facing spike at Mach 6 and Reynolds number of 1·38 × 108 at 0° and 5° angle-of-attack. The oil flow pictures depict the separation region in the vicinity of the spike on the hemisphere-cylinder body. The oil flow visualisations will help to locate the reattachment shock wave on the hemisphere-cylinder body and also understand the flow field behavior on the blunt-nosed spike configuration. The pressure measurements over the hemisphere-cylinder body depend on the shape and the length of the spike. The pressure distributions over the blunt-nosed body show significant influence of the angle-of-attack. The maximum pressure coefficient on the hemisphere-cylinder body is a function of the spike length, shape of the aerodisk and angle-of-attack. The windward and leeward sides pressure variations show dependence of the geometrical parameters of the spike and shape of the spike. The hemisphere and the flat-faced aerodisk cause considerable reduction of pressure leading to decrease of aerodynamic drag compared to the conical spike.

Type
Research Article
Information
The Aeronautical Journal , Volume 117 , Issue 1192 , June 2013 , pp. 639 - 646
Copyright
Copyright © Royal Aeronautical Society 2013 

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References

1. Wood, C. J. Hypersonic flow over spiked cones, J Fluid Mechanics, 1961, 12, (4), pp 614–624.Google Scholar
2. Crawford, D.H. Investigation of the flow over a spiked-nose hemisphere-cylinder, NASA TND-118. December 1959.Google Scholar
3. Bogdonoff, S.M. and Vas, I.E. Preliminary investigations of spiked bodies at hypersonic speeds, J Aerospace Sciences, 1959, 26, (2), pp 65–74.Google Scholar
4. Kabelitz, H. Zur stabilität geschlossener greznschichtablòsegebeite an komschen drehkòrpern bei hyperschallstromung, DLR, FB: 71–77, Germany, 1971.Google Scholar
5. Feszty, D., Badcock, K.J. and Richards, B.E. Driving mechanism of high-speed unsteady spiked body flows, Part 1 & 2, AIAA J, 2004, 42, (l),pp 95–113.Google Scholar
6. Maull, D. J. Hypersonic flow over axially symmetric spiked bodies, J Fluid Mechanics, 1960, 8, (4), pp 584–592.Google Scholar
7. Stadler, J.R. and Nielsen, H. V. Heat transfer from a hemisphere-cylinder equipped with flow-separation spikes, NACATN 3287, September 1954.Google Scholar
8. Guenther, R.A. and Reding, J.P. Fluctuating pressure environment of a drag reduction spike, J Spacecraft and Rockets, 1977, 14, (12), pp 705–710.Google Scholar
9. Motoyama, N., Mhara, K., Miyajima, R., Watanuki, T. and Kubota, H. Thermal protection and drag reduction with use of spike in hypersonic flow, AIAA paper 2001 -1828, 2001.Google Scholar
10. Kalimuthu, R., Mehta, R.C. and Rathakrishnan, E. Experimental investigation on spiked body in hypersonic flow, Aeronaut J, 2008, 112, (1136), pp 593–598.Google Scholar
11. Yamauchi, M., Fujii, K., Tamura, Y. and Higashino, F. Numerical investigation of supersonic flows around a spiked blunt body, AIAA paper 93-0887, January 1993.Google Scholar
12. Gauer, M. and Paull, A. Numerical investigation of a spiked blunt nose cone at hypersonic speeds, J Spacecraft and Rockets, 2008, 45, (3), pp 459–471.Google Scholar
13. Ahmed, M.Y.M. and Qin, N. Recent advances in the aerothermodynamics of spiked hypersonic vehicles. Progress in Aerospace Sciences, 2011, 47, pp 425–449.Google Scholar
14. Rathakrishnan, E. Gas Dynamics, 2nd Edition, Prentice Hall of India, New Delhi, India, 2008.Google Scholar