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

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

DOI QR Code

A Transitional Behavior of a Premixed Flame and a Triple Flame in a Lifted Flame(II)

부상화염에서 예혼합화염과 삼지화염의 천이적 거동(II)

  • 장준영 (계명대학교 산업기술연구소) ;
  • 김태권 (계명대학교 기계자동차공학부)
  • Published : 2005.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the paper we investigate characteristics of a transitional behavior from a premixed flame to a triple flame in a lifted flame according to the change of equivalence ratio. In previous study, we showed that the stabilized laminar lifted flame regime is categorized by regimes of premixed flame, triple flame and critical flame. A gas-chromatograph is used to measure concentration field, a smoke-wire system is used to measure streak line, and a PIV system is used to measure velocity field in lifted flame. In the visualization experiment of smoke wire, the flow divergence and redirection reappeared in premixed flame as well as triple flame. Thus we cannot express the flame front of lifted flame has a behavior of triple flame with only flow divergence and redirection. In PIV measurement, flow velocity for those three flames has minimum value at the tip of flame front. To differentiate triple flame and premixed flame, $\Phi$ value of partially premixed fraction is employed. The partially premixed fraction $\Phi$ was constant in premixed flame. In critical flame small gradient appears over the whole regime. In triple flame, typical diffusion flame shape is obtained as parabolic distribution type due to diffusion flame trailing.

Keywords

References

  1. Kioni, P. N., Rogg, B., Bray, K. N. C. and Linan, A., 1993, 'Flame Spread in Laminar Mixing Layers: The Triple Flame,' Combustion and Flame, Vol. 95, pp. 276-290 https://doi.org/10.1016/0010-2180(93)90132-M
  2. Azzoni, R., Ratti, S., Aggarwal, S. K. and Puri, I. K., 1999, 'The Structure of Triple Flame Stabilized on a Slot Burner,' Combustion and Flame, Vol. 119, pp. 23~40 https://doi.org/10.1016/S0010-2180(99)00047-4
  3. Kioni, P. N., Bray, K. N. C., Greenhalgh, D. A. and Rogg, B., 1999, 'Experimental and Numerical Studies of a Triple Flame,' Combustion and Flame, Vol. 116, pp. 192~206 https://doi.org/10.1016/S0010-2180(98)00035-2
  4. Philips, H., 1965, 'Flame in a Buoyant Methane Layer,' Twenty Symposium (International) on Combustion, The Combustion Institute, pp. 1277∼1283
  5. Schefer, R. W., Namazian, M. and Kelly, J., 1988, 'Structural Characteristics of Lifted Turbulent-Jet Flames,' Twenty-Second Symposium (International) on Combustion, The Combustion Institute, pp. 833~842
  6. Mansour, M. S., 2003, 'Stability Characteristics of Lifted Turbulent Partially Premixed Jet Flames,' Combustion and Flame, Vol. 133, pp. 263~274 https://doi.org/10.1016/S0010-2180(02)00566-7
  7. Miake-lye, R. C. and Hammer, J. A., 1988, 'Lifted Turbulent Jet Flames: A Stability Criterion Based on The Jet Large-Scale Structure,' Twenty-Second Symposium (International) on Combustion, The Combustion Institute, pp. 817-824
  8. Everest, D. A., Feikema, D. A. and Driscoll, J. F., 1996, 'Image of Strained Flammable Layer Used to Study the Liftoff of Turbulent Jet Flames,' Twenty-Sixth Symposium (International) on Combustion, The Combustion Institute, pp. 129~136
  9. Jang, J. Y., Kim, T. K. and Park, J., 2005, 'A Transitional Behavior of a Premixed Flame and a Triple Flame in a Lifted Flame (I),' Transaction of the Korean Society Mechanical Engineer (B), submitted
  10. Puri, I. K., Aggarwal, S. K., Ratti, S. and Azzoni, R., 2001, 'On the Similitude Between Lifted and Burner-Stabilized Triple Flames: A Numerical and Experimental Investigation,' Combustion and Flame, Vol. 124, pp. 311~325 https://doi.org/10.1016/S0010-2180(00)00201-7
  11. Favier, V. and Vervisch, L., 2001, 'Edge Flame and Partially Premixed Combustion in Diffusion Flame Quenching,' Combustion and Flame, Vol. 125, pp. 788~803 https://doi.org/10.1016/S0010-2180(00)00242-X
  12. Ruetsch, G. R., Vervisch, L. and Linan, A., 1995, 'Effects of Heat Release on Triple Flames,' Phys. Fluids, Vol. 7, No. 6, pp. 1447~1454 https://doi.org/10.1063/1.868531

Cited by

  1. OH-radical behavior of unsteady lifted flame based on instantaneous change of the equivalence ratio vol.10, pp.6, 2009, https://doi.org/10.1007/s12239-009-0078-1