Advances in aircraft and spacecraft science

  • 제6권3호
  • /
  • Pages.225-238
  • /
  • 2019
  • /
  • 2287-528X(pISSN)
  • /
  • 2287-5271(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Measured aerodynamic coefficients of without and with spiked blunt body at Mach 6

  • Kalimuthu, R. (Vikram Saarabhai Space Centre) ;
  • Mehta, R.C. (Department of Aeronautical Engineering, Noorul Islam Centre for Higher Education) ;
  • Rathakrishnan, E. (Department of Aerospace Engineering, Indian Institute of Technology)
  • 투고 : 2018.08.20
  • 심사 : 2019.01.10
  • 발행 : 2019.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

A spike attached to a blunt nosed body significantly alters its flow field and influences the aerodynamic coefficients at hypersonic speed. The basic body is an axisymmetric, with a hemisphere nose followed by a cylindrical portion. Five different types of spikes, namely, conical aerospike, hemisphere aerospike, flat-face aerospike, hemisphere aerodisk and flat-face aerodisk are attached to the basic body in order to assess the aerodynamic characteristic. The spiked blunt body without the aerospike or aerodisk has been set to be a basic model. The coefficients of drag, lift and pitching moment were measured with and without blunt spike body for the length-to-diameter ratio (L/D) of 0.5, 1.0, 1.5 and 2.0, at Mach 6 and angle of attack up to 8 degrees using a strain gauge balance. The measured forces and moment data are employed to determine the relative performance of the aerodynamic with respect to the basic model. A maximum of 77 percent drag reduction was achieved with hemisphere aerospike of L/D = 2.0. The comparison of aerodynamic coefficients between the basic model and the spiked blunt body reveals that the aerodynamic drag and pitching moment coefficients decrease with increasing the L/D ratio and angle of attack but the lift coefficient has increasing characteristics.

키워드

참고문헌

  1. Ahmed, M.Y.M. and Qin, N. (2011), "Recent advances in the aerothermodynamics of spiked hypersonic vehicles", Prog. Aerosp. Sci., 47(6), 425-449. https://doi.org/10.1016/j.paerosci.2011.06.001.
  2. Chang, P.L. (1970), SEPRATION OF FLOW, Pergamon Press, Oxford, U.K.
  3. Daniels, L.E. and Yoshihara, H. (1954), "Effect of the upstream influences of a shock wave at supersonic speeds in the presence of a separated boundary flows", WADC Technical Report, U.S.A.
  4. Deng, F., Liang, B., Xie, F. and Qin, N. (2017), "Spike effects on drag reduction for hypersonic lifting body", J. Spacecraft Rockets, 54(6), 1185-1195. https://doi.org/10.2514/1.A33865.
  5. Gerdroodbary, M.B. and Hosseinalipour, S.M. (2010), "Numerical simulation of hypersonic flow over highly blunted cones with spike", Acta Astronautica, 67(1-2), 180-193. https://doi.org/10.1016/j.actaastro.2010.01.026.
  6. Huang, W., Li, L., Yan, L.Q. and Zhang, T.T. (2017), "Drag and heat flux reduction mechanism of blunted cone and aerodisks", Acta Astronautica, 136, 168-178. https://doi.org/10.1016/j.actaastro.2017.05.040.
  7. Jones, J.J. (1952), "Flow separation from rods ahead of Blunt Nose at Mach number 2.72", NACA RM, L52E05a, U.S.A.
  8. Kalimuthu, R. (2009), "Experimental investigation of hemispherical nosed cylinder with and without spike in a hypersonic flow", Ph. D. Thesis, Indian Institute of Technology, Kanpur, India.
  9. Kalimuthu, R., Mehta, R.C. and Rathakrishnan, E. (2008a), "Experimental investigation on spiked body at hypersonic flow", Aeronaut. J., 112(1136), 593-598. https://doi.org/10.1017/S0001924000002554.
  10. Kalimuthu, R., Mehta, R.C. and Rathakrishnan, E. (2017b), "Investigation of aerodynamic coefficients at Mach 6 over conical, hemispherical and flat-face spiked body", Aeronaut. J., 121(1245), 1711-1732. https://doi.org/10.1017/aer.2017.100.
  11. Mair, W.A. (1952) "Experiments on separation of boundary layers on probes in front of blunt-nosed bodies in a supersonic air stream", Phil. Mag. J. Sci., 43 (342), 695-716. https://doi.org/10.1080/14786440708520987.
  12. Maull, D.J. (1960), "Hypersonic flow over axially symmetric spiked bodies", J. Fluid Mech., 8, 584-594. https://doi.org/10.1017/S0022112060000815.
  13. Mehta, R.C. (2010a), "Numerical simulation of the flow field over conical, disk and flat spiked body at Mach 6", Aeronaut. J., 114 (1154), 225-236. https://doi.org/10.1017/S0001924000003675.
  14. Mehta, R.C. (2013b), "Numerical heat transfer study around a spiked blunt-nose body at Mach 6", Heat Mass Transfer, 49(4), 485-496. https://doi.org/10.1007/s00231-012-1095-6.
  15. Menezes, V., Saravanan, A. and Reddy, K.P.J. (2002a), "Shock tunnel study of spiked aerodynamic bodies flying at hypersonic Mach number", Shock Waves, 12, 197-204. https://doi.org/10.1007/s00193-002-0160-3.
  16. Menezes, V., Saravanan, S., Jagadeesh, G. and Reddy, K.P.J. (2009b), "Aerodynamic drag reduction using aerospikes for large angle blunt cone flying at hypersonic Mach number", Proceedings of the 22nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, St. Louis, Missouri, U.S.A., June.
  17. Moeckel, W.E. (1951), Flow Separation Ahead of Blunt Bodies at Supersonic Speeds, NACA TN-2418, U.S.A.
  18. Motoyama, N., Mihara, K., Miyajima, R., Watanuki, T. and Kubota, H. (2001), "Thermal protection and drag reduction with use of spike in hypersonic flow", AIAA paper 2001-1828, U.S.A.
  19. Schulein, E. (2008), "Wave drag reduction approach for blunt bodies at high angles of attack: proof-ofconcept experiments", AIAA Paper 2008-4000, U.S.A.
  20. Sebastian, J.J., Suryan, A. and Kim, H.D. (2016), "Numerical analysis of hypersonic flow past blunt bodies with aerospikes", J. Spacecraft Rockets, 53(4), 669-677. https://doi.org/10.2514/1.A33414.
  21. Wang, Z.G., Sun, X.W., Huang, W., Li, S.B. and Yan, L. (2016), "Experimental investigation on drag and heat flux reduction in supersonic/hypersonic flows: A survey", Acta Astronautica, 129, 95-110. https://doi.org/10.1016/j.actaastro.2016.09.004.
  22. Wood, C.J. (1961), "Hypersonic flow over spiked cones", J. Fluid Mech., 12(4), 614-624. https://doi.org/10.1017/S0022112062000427.
  23. Yadav, R. and Guven, U. (2013), "Aerothermodynamics of a hypersonic projectile with a double-disk aerospike", Aeronaut. J., 117(1195), 913-928. https://doi.org/10.1017/S0001924000008587.
  24. Yamauchi, M., Fujii, K., Tamura, Y. and Higashino, F. (1993), "Numerical investigation of supersonic flows around a spiked blunt body", J. Spacecraft Rockets, 32(1), 32-42. https://doi.org/10.2514/3.26571.