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

  • 제26권1호
  • /
  • Pages.133-140
  • /
  • 2002
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

횡분류(流)(橫噴流)에서 난류 비예흔합 화염의 화염날림에 대한 거대 와(渦)구조 혼합 모텔 적용

A Large-scale Structural Mixing Model applied to Blowout of Turbulent Nonpremixed Jet Flames in a Cross Jet Flow

  • 이기만 (전남도립담양대학 기계공학과) ;
  • 박정 (순천대학교 기계자동차공학부)
  • 발행 : 2002.01.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This article presents an application of a large-scale structural mixing model(Broadwell et at. 1984) to the blowout of turbulent reacting cross flow jets. Experimental observations, therefore, aim to identify the existence of large-scale vortical structure exerting an important effect upon the flame stabilization. In the analysis of common stability curve, it is seen that the phenomenon of blowout are only related to the mixing time scale of the two flows. The most notable observation is that the blowout distance is traced at a fixed positions according to the velocity ratio at all times. Measurements of the lower blowout limits in the liftable flame are qualitatively in agreement with the blowout parameter $\xi$, proposed by Broadwell et al. Good agrement between the results calculated by a modified blowout parameter $\xi$'and the present experimental results confirms the important effect of large-scale structure in the stabilization feature of blowout.

키워드

참고문헌

  1. Tieszen, SR, Stamps, D.W. and O'hern, T.J., 1996, 'A Heuristic Model of Turbulent Mixing Applied to Blowout of Turbulent Jet Diffusion Flames,' Combustion and Flame, Vol. 106, p. 442 https://doi.org/10.1016/0010-2180(96)00008-9
  2. Vanquickenborne L. and Van Tiggelen A., 1969, 'The Stabilization Mechanism of Lifted Diffusion Flames,' Combustion and Flame, Vol. 86, p.59 https://doi.org/10.1016/0010-2180(66)90028-9
  3. Broadwell J. E, Dahm W. J. and Mungal M. G., 1984, 'Blow-out of Turbulent Diffusion Flames,' 20th Symp (int) on Combustion, p. 303
  4. Dahm, W.J.A. and Dibble, R.D., 1988, 'Coflowing Turbulent Jet Diffusion Flame Blowout,' 22th Sym. (Int) on Combustion, p. 801
  5. Lee, K.M. and Shin, H.D., 1997, 'A large-scale Structural Mixing Model Applied to Blowout of Turbulent Non-Premixed Jet Flames in a Cross Air-Flow,' J of the Institute of Energy, Vol. 70, p. 128
  6. Huang, R.F. and Chang J.M., 1994, 'The Stability and Visualized Flame and Flow Structure of a Combusting Jet in Cross Flow,' Combustion and Flame, Vol. 98, p. 267 https://doi.org/10.1016/0010-2180(94)90241-0
  7. Kalghatgi G.T., 1981, 'Blowout Stability of Gaseous Jet Diffusion Flames. Part II: Effect of Cross Wmd,' Combust Sci and Tech, Vol. 26, p. 241 https://doi.org/10.1080/00102208108946965
  8. Birch, A.D. and Hargrave, G.K., 1988, 'Lift-off Heights in Underexpanded Natural Gas Jet Flames,' 22nd Sym. (International) on Combustion
  9. Park, JW. and Shin, H.D., 1993, 'Effect of Large-Scale Turbulent Structures on the Lift-off Behavior of Turbulent-Jet Diffusion Flames,' J of the Institute of Energy, Vol. 66, p. 198
  10. Mungal, M.G. and Hollingsworth, D.K., 1989, 'Organized Motion in a Very High Reynols Number Jet,' Phys. Fluids A1(10), p. 1615 https://doi.org/10.1063/1.857527
  11. Mungal, M.G. and O'Neil, JM., 1989, 'Visual Observation of a Turbulent Diffusion Flame,' Combustion and Flame, Vol. 78, p. 377 https://doi.org/10.1016/0010-2180(89)90025-4
  12. Mungal, M.G., Karasso, P.S. and Lozano, A., 1991, 'The Visible Structure of Turbulent Jet Diffusion Flames, Large-Scale Organization and Flame Tip Oscillation,' Combust. Sci. and Tech., Vol. 76, p. 165 https://doi.org/10.1080/00102209108951708
  13. Broadwell, J.E. and Mungal, M.G., 1991, 'Large-Scale Structure and Molecular Mixing,' Phys. Fluids A3(5) , p. 1193 https://doi.org/10.1063/1.858048
  14. Prette, B.D. and Baines, W.D., 1967, 'Profiles of the Round Turbulent Jet in a Cross Flow,' ASCE, HY6, 92, p. 53
  15. Keffer, J.F. and Baines, W.D., 1962, 'The Round Turbulent Jet in a Cross-Wind.' J Fluids Mechanics, Vol. 15, p. 481 https://doi.org/10.1017/S0022112063000409
  16. Broadwell, J.E. and Breidenthal, R.E., 1984, 'Structure and Mixing of a Transverse Jet in Incompressible Flow,' J Fluid Mechanics, Vol. 148, p. 405 https://doi.org/10.1017/S0022112084002408
  17. Pitts W.M., 1988, 'Assessment of Theirs for the Behavior and Blowout of Lifted Turbulent Jet Diffusion Flames,' 22nd symp. (int) on Combustion, p. 809
  18. 이기만, 1998, 주유동에 수직으로 분사한 난류 확산 화염의 특성에 관한 실험적 연구, 공학박사학위논문, 한국과학기술원