Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Blow-off and Combustion Characteristics of a Lifted Coaxial Diffusion Flame

동축 확산 부상화염의 Blow-off와 연소 특성

  • 곽지현 (부산대학교 대학원 기계공학과) ;
  • 전충환 (부산대학교 기계공학부, 기계기술연구소) ;
  • 장영준 (부산대학교 기계공학부, 기계기술연구소)
  • Published : 2003.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

An experiment was performed to investigate lift-off, blow-off and combustion characteristics of a lifted coaxial diffusion flame according to fuel jet and air velocity. A jet diffusion flame which is attached on the nozzle rim begins to be lifted with increase of air velocity, and finally becomes blow-off at higher air velocity. In experiment, blow-off limit increased with increase of fuel jet velocity, however lift-off occurred at lower air velocity. Flame structure and combustion characteristics were examined by schlieren photos, temperature distributions and emission concentration distributions. Flame temperature became higher at midstream and its RMS became larger at up and downstream with increase of air velocity. Local NO concentration decreased but $CO_2$concentration increased with increase of air velocity, which shows combustion reaction becomes close to be stoichiometric at higher air velocity in spite of lift-off.

Keywords

References

  1. Turns, S. R., 2000, 'An Introduction to Combustion:Concepts and Applications,' McGRQW-HILL
  2. Broadwell, J. E., Dahm, W. J. A., and Mungal, M. G., 1984, Twentieth Symposium (International) on Combustion,The Combustion Institute, p. 303
  3. Dahm, W. J. A. and Dibble, R. W., 1988, Twenth-Second Symposium (International) on Combustion, The Combustion Institute, p. 801
  4. Takahashi, F., Mizomoto, M., Ikai, S., and Futaki, N., 1984, Twentieth Symposium (International) on Combustion,The Combustion Institute, p. 295
  5. Eickhoff, H., Lnze, B., and Leuckel, W., 1984, Twentieth Symposium (International) on Combustion,The Combustion Institute, p. 311
  6. Vanquickenborne, L. and Tiggelen, V. A., 1966, Combstion and Flame, Vol. 10, p. 59 https://doi.org/10.1016/0010-2180(66)90028-9
  7. Hall, L., Horch, K., and Gunther, R., 1980, Brennst-Warme-Kraft Vol. 32, p. 26
  8. Kalghatgi, G. T., 1984, Combustion Science and Technology, Vol. 41, p. 17 https://doi.org/10.1080/00102208408923819
  9. Peters, N. and Williams, F. A., 1983, AIAA Journal, Vol. 21, p. 423 https://doi.org/10.2514/3.8089
  10. Byggstoyl, S. and Magnussen, B. F., 1985, Turbulent Shear Flows, Vol. 4, p. 381
  11. Miake-Lye, R. and Hammer, J. A., 1988, Twenty-Second Symposium (International) on Combustion,The Combustion Institute, p. 817
  12. Schefer, R. W., Namazian, M., and Kelly, J., 1988, Twenty-Second Symposium (International) on Combustion,The Combustion Institute, p. 833
  13. Birch, A. D. and Hargrave, G. K., 1988, Twienty-Second Symposium (International) on Combustion,The Combustion Institute, p. 825
  14. Yuasa, S., 1986, Combustion and Flame, Vol. 66, pp. 181-192 https://doi.org/10.1016/0010-2180(86)90090-8
  15. Pitts, W. M., 1988, Twenty-Second Symposium (International) on Combustion,The Combustion Institute, p. 809
  16. Reynolds, O., 1883, 'An Experimental Investigation fo the Circumstances Which DetermineWhether the Circumstances Which Determine Whether the Motion of Water Shall be Direct or Sinuous and of the Law of Resistance in Parallel Channels,' Transactions of Royal Society of London, Vol. 174, pp. 935-982 https://doi.org/10.1098/rstl.1883.0029
  17. Mahmud, C. Y., Fairweather, M., and Hampartsoumian, E., 2002, Combustion and Flame, Vol. 128, pp. 60-73 https://doi.org/10.1016/S0010-2180(01)00332-7
  18. Lee, J. and Chung, S. H., 2001, Combustion and Flame, Vol. 127, pp. 2194-2204 https://doi.org/10.1016/S0010-2180(01)00321-2
  19. Chen, Y. C. and Bilger, R. W., 2000, Combustion and Flame, Vol. 123, pp. 23-45 https://doi.org/10.1016/S0010-2180(00)00150-4
  20. Burgess, C. P. and Lawn, C. J., 1999, Combustion and Flame, Vol. 119, pp. 95-108 https://doi.org/10.1016/S0010-2180(99)00037-1
  21. Schefer, R. W. and Goix, P. J., 1998, Combustion and Flame, Vol. 112, pp. 559-574 https://doi.org/10.1016/S0010-2180(97)00130-2
  22. Seo, J. I., Kim, N. I. and Shin, H. D., 2001, 'Concentration Gradient Effects on Lifted Characteristics of Triple Flame on a Slot Burner,' 24th KOSCO symposium, pp. 99-105
  23. Lee, J. S., Won, S. H., Jin, S. H. and Chung, S. H., 2001, 'Lifted Flames in Laminar Coflow Jets of Propane,' 24th KOSCO symposium, pp. 61-67
  24. Lee, S. and Lee, B. J., 2001, 'Characteristics of Interacting Lifted Flames,' Transaction of Korea Society of Mechanical Engineers, Vol. 25, No. 4, pp. 461-466
  25. Transaction of Korea Society of Mechanical Engineers v.25 no.4 Characteristics of Interacting Lifted Flames Lee,S.;Lee,B.J.