Hypersonic flow over hemispherical blunt body with spikes

Document Type : Article


1 Department of Space Engineering and Rocketry, Birla Institute of Technology, Mesra, Ranchi, JH-835215, India

2 Birla Institute of Technology, Deoghar, Jharkhand, India


Use of spike on a hemispherical body changes the flow field and hence the aerodynamic drag. Computational studies have been made to obtain the flow field around a hemispherical body with spikes at a hypersonic Mach number of 6. The effect of shape of spike tip and length has been studied. Laminar computations have been made adopting structured grid using commercial software Fluent. It is observed that use of a sharp spike itself reduces the drag signicantly. However the use of a hemispherical head spike further reduces the drag. Contribution of dierent components towards drag indicate that the increase in length of a spike do not change the spike contribution. However the flow field on main body is altered which leads to reduction in drag
with change in length. Estimated maximum drag obtained is found to be highest in comparison to any reported drag value in literatures with any spike shape and length.


Main Subjects

  1. Crawford, D.H., Investigation of Flow Over a Spiked Nose Hemisphere-Cylinder at Mach Number of 6.8, NASA TN D 118 (1959). 2. Maull, D.J. Hypersonic ow over axially symmetric spiked bodies", Journal of Fluid Mechanics, 8, pp. 584- 592 (1960) 3. Panaras, A.G. and Drikakis, D. High-speed unsteady ows around spiked-blunt bodies", Journal of Fluid Mechanics, 632, pp. 69-96 (2009). 4. Menezes, V., Saravanan, S., and Reddy, K.P.J. Shock tunnel study of spiked aerodynamic bodies ying at hypersonic Mach numbers", Shock Waves, 12, pp.197- 204 (2002). 5. Kalimuthu, R., Mehta, R.C., and Rathakrishnan, E. Experimental investigation on spiked body in hypersonic ow", The Aeronautical Journal, 112(1136), pp. 593-598 (2008). 6. Kalimuthu, R. and Rathakrishnan, E. Aerospike for drag reduction in hypersonic ow", AIAA-2008-4707 (2008). 7. Ahmed, M.Y.M. and Qin, N. Drag reduction using aerodisks for hypersonic hemispherical bodies", Journal of Spacecraft and Rockets, 47(1), pp. 62-80 (2010). 8. Ahmed, M.Y.M. and Qin, N. Numerical investigation of aeroheating characteristics of spiked blunt bodies at Mach six ight conditions", The Aeronautical Journal, 115(1168), pp. 377-386 (2011). 9. Ahmed, M.Y.M. and Qin, N. Recent advances in the aerothermodynamics of spiked hypersonic vehicles", Progress in Aerospace Sciences, 47, pp. 425-449 (2011). 10. Gauer, M. and Paull, A. Numerical investigation of spiked blunt nose cone at hypersonic speeds", Journal of Spacecraft and Rockets, 45(3), pp. 459-471 (2008). 11. Tahani, M., Karimi, M.S., Motlagh, A.M., and Mirmahdian, S. Numerical investigation of drag and heat reduction in hypersonic spiked blunt bodies", Heat and Mass Transfer, 49, pp. 1369-1384 (2013). 12. Gerdroodbary, M.B. and Hosseinalipour, S.M. Numerical simulation of hypersonic ow over highly blunted cones with spike", Acta Astronautica, 67, pp. 180-193 (2010). 13. dHumieres, G. and Stollery, J.L. Drag reduction on a spiked body at hypersonic speed", The Aeronautical Journal, 114(1152), pp. 113-119 (2010). 14. Sebastian, J.J., James, S.E., and Suryan, A. Computational study of hypersonic ow past spiked blunt body using RANS and DSMC method", Procedia Technology, 25, pp. 892-899 (2016). 15. Eghlima, Z. and Mansour, K. Drag reduction for the combination of spike and counterow jet on blunt body at high Mach number ow", Acta Astronautica, 133, pp. 103-110 (2017). 16. Qin, Q., Xu, J., and Guo, S. Fluid-thermal analysis of aerodynamic heating over spiked blunt body con_gurations", Acta Astronautica, 132, pp. 230-242 (2017). 17. Yadav, R., Velidi, G., and Guven, U. Aerothermodynamics of generic re-entry vehicle with a series of aerospikes at nose", Acta Astronautica, 96, pp. 1-10 (2014). 18. Sahoo, D., Das, S., Kumar, P., and Prasad, J.K. E_ect of spike on steady and unsteady ow over a blunt body at supersonic speed", Acta Astronautica, 128, pp. 521-533 (2016). 19. Das, S., Kumar, P., Ralh, M.K., Rao, R.K.M., and Prasad, J.K. Drag reduction of a hemispherical body adopting spike at supersonic speed", Jr. of Aerospace Sciences and Technologies, 65(4), pp. 313-325 (2013).