Browse > Article
http://dx.doi.org/10.3795/KSME-B.2003.27.10.1420

Stability Enhancement by the Interaction of Diffusion Flames  

Kim, Jin-Sun (영남대학교 대학원 기계공학부)
Lee, Byeong-Jun (영남대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.10, 2003 , pp. 1420-1426 More about this Journal
Abstract
The stability of turbulent nonpremixed interacting flames is investigated in terms of nozzle configuration shapes and kind of fuels. Four nozzle arrangements - cross 5, matrix 8, matrix 9 and circle 8 nozzles - are used in the experiment. There are many parameters affecting flame stability in multi-nozzle flames such as nozzle separation distance, fuel flowrates and nozzle configuration etc. Key factors to enhance blowout limit are the nozzle configuration and the existence of center nozzle. Even nozzle exit velocity equal 204 m/s, flame is not extinguished when there is not a center nozzle and s/d=15.3∼27.6 in matrix-8 and circular-8 configurations. At these conditions, recirculation of burnt gas is related with stability augmentation. Fuel mole fraction measurements using laser induced fluorescence reveal lifted flame base is not located at the stoichiometric contour.
Keywords
Flame Stability; Interaction; Blowout; Turbulent Lifted Flame; Nonpremixed Flame;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
1 Menon, R. and Gollahalli, S. R., 1985, 'Multiple Jet Gas Flames in Still Air,' In Heat Transfer in Fire and Combustion Systems, ASME publication HTD Vol. 45, pp 127-136
2 Broadwell, J. E., Dahm. W. J., and Mungal, M. G., 1984, 'Blowout of Turbulent Diffusion Flames,' Twenties Symposium (International) on Combustion, The Combustion Institute, pp. 303-310
3 Kim, H.Y., Chun, C.K., 1991,'The Interaction of Gaseous Diffusion Flames,' Trans. of KSME, Vol. 15, No. 1, pp. 355-365   과학기술학회마을
4 Kalghatgi, G. T., 1984, 'Lift-off Heights and Visible Lengths of Vertical Turbulent Jet Diffusion Flames in Still Air,' Combust. Sci. Tech., 41, pp. 17-29   DOI
5 Menon, R. and Gollahalli, S. R., 1988, 'Combustion Characteristics of Interaction Multiple Jets in Cross Flow,' Combustion. Science and Technology, Vol. 60, pp 375-389   DOI   ScienceOn
6 Lee, S. and Lee, B.J., 2001, 'Characteristics of Interacting Lifted Flames,' Trans. of KSME(B), Vol. 25, No. 4, pp. 461-466   과학기술학회마을
7 Roper, F. G., 1977, 'The Prediction of Laminar Jet Diffusion Flame Size:Part Ⅰ. Theoretical Model,' Combust. Flame, Vol. 29, pp. 219-226   DOI   ScienceOn
8 Turns, S. R., 1996, An introduction to combustion, McGraw Hill, 2ed
9 Chun, C.K., 1993, 'Production of NO in Interacting Laminar Diffusion Flames,' Trans. of KSME, Vol. 17, No. 1, pp. 190-199   과학기술학회마을
10 Nasr, A. and Lai, J. C. S., 1997, Two Parallel Plane Jets : Mean Flow and Effects of Acoustic Excitation, Experimental in Fluids, Vol. 22, pp. 251-260   DOI
11 Vanquickenborne, L., and van Tigglen, A., 1969, 'The Stabilization Mechanism of Lifted Diffusion Flames,' Combust. Flame, Vol. 10, pp. 59-69   DOI   ScienceOn