International Scientific Journal


The interactions between flame and vortex in a 2-D Trapped Vortex Combustor are investigated by simulating the Reynolds Averaged Navier Stokes (RANS) equations, for the following five cases namely (i) non-reacting (base) case, (ii) post-vortex ignition without premixing, (iii) post-vortex ignition with premixing, (iv) pre-vortex ignition without premixing and (v) pre-vortex ignition with premixing. For the post-vortex ignition without premixing case, the reactants are mixed well in the cavity resulting in a stable ‘C’ shaped flame along the vortex edge. Further, there is insignificant change in the vorticity due to chemical reactions. In contrast, for the pre-vortex ignition case (no premixing); the flame gets stabilized at the interface of two counter rotating vortices resulting in reduced reaction rates. There is a noticeable change in the location and size of the primary vortex as compared to case (ii). When the mainstream air is premixed with fuel, there is a further reduction in the reaction rates and thus structure of cavity flame gets altered significantly for case (v). Pilot flame established for cases (ii) and (iii) are well shielded from main flow and hence the flame structure and reaction rates do not change appreciably. Hence, it is expected that cases (ii) and (iii) can perform well over a wide range of operating conditions.
PAPER REVISED: 2012-06-27
PAPER ACCEPTED: 2012-09-15
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  1. Hendricks, R. C., Shouse, D. T., Roquemore, W. M., Burrus, D. L., Duncan, B. S., Ryder, R. C., Brankovic, A, Liu, N. S., Gallagher, J. R., and Hendrickss, J. A., Experimental and Computational Study of Trapped Vortex Combustor Sector Rig with High-Speed Diffuser Flow, International Journal of Rotating Machinery, 7 (2001), pp. 375-385
  2. Hsu, K. Y., Goss, L. P and Roquemore, W. M., Characteristics of a Trapped-Vortex Combustor, Journal of Propulsion and Power, 14 (1998), pp. 57-65
  3. Little Jr B. H., and Whipkey, R. R., Locked Vortex After bodies, Journal of Aircraft, 16, (1978), pp.296 - 302
  4. Katta, V. R., and Roquemore, W. M., Study on Trapped Vortex Combustor - Effect of Injection on Flow Dynamics, Journal of Propulsion and Power, 14 (1998), pp. 273-281
  5. Sturgess, G. J., and Hsu, K. Y., Entrainment of Mainstream Flow in a Trapped-Vortex Combustor, Proceedings, 35th Aerospace Sciences Meeting & Exhibit, January, 6-9, 1997, Reno, AIAA Paper 97-0261
  6. Christopher Stone and Suresh Menon, Simulation of Fuel-Air Mixing and Combustion in a Trapped-Vortex Combustor, Proceedings, 38th Aerospace Sciences Meeting and Exhibit, January, 10-13, 2000, Reno, AIAA 2000-0478
  7. Mishra, D. P., Sudharshan, R., Numerical Analysis of Fuel-Air Mixing in a 2D Trapped Vortex Combustor, Proc. IMechE, Part G: J Aerospace Engineering, 224 (2009), pp. 65-75
  8. Hewett, J. S. and Madina, C. K., Flame-Vortex Interaction in a Reacting Vortex Ring, Physics of Fluids, 10 (1998), pp.189-205
  9. Renard, P. H., Thevenin, D., Rolon, J. C., and Candel, S., Dynamics of Flame/Vortex Interactions., Progress in Energy and Combustion Science, 26 (2000), pp.255-282
  10. FLUENT® v6.3.26 Documentation, 1998
  11. Magnussen, B. F. and Hjertager, B. H., On Mathematical Modeling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion. Proceedings of the Combustion Institute, 17 (1977), pp. 719-729
  12. Ahuja and Mendoza, Effects of Cavity Dimensions, Boundary Layer, and Temperature on Cavity Noise with Emphasis on Benchmark Data to Validate Computational Aero-acoustic Codes, NASA Contractor Report, No. 4653, 1995
  13. Sudharshan, R., Numerical Analysis of a 2D Trapped Vortex Combustor, M.Tech. Thesis, Indian Institute of Technology, Kanpur, India, 2008
  14. Ezhil Kumar, P. K., Mishra, D. P., Numerical Modeling of an Axisymmetric Trapped Vortex Combustor, Internal Journal of Turbo and Jet Engines, 28 (2011), pp 41-52
  15. Robert.S.Brodkey, Turbulence in Mixing Operations: Theory and Application to Mixing and Reaction. Academic Press, London, 1975

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