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Soot Formation Characteristics on the Instability of Laminar Diffusion Flames  

Nam, Youn-Woo (단국대학교 기계공학과)
Lee, Won-Nam (단국대학교 기계공학과)
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Journal of the Korean Society of Combustion / v.15, no.3, 2010 , pp. 74-81 More about this Journal
In this study, soot formation characteristics on the instability of laminar diffusion flames were investigated experimentally using a concentric co-flow burner. When a small amount of air was supplied through an inner nozzle, a stable propane laminar diffusion flame became unstable and began to oscillate mainly due to the dilution effect. The increase of air flow rate transformed an oscillating non-sooting flame into a stable nonsooting flame. When the air flow rate was continuously increased an inner flame was formed and the flame was changed to an oscillating sooting flame, an oscillating non-sooting flame and finally a stable non-sooting hollow flame. When the air flow rate was decreased, a non-sooting hollow flame was eventually changed back to a stable non-sooting flame. The presence of an inner flame, however, altered the soot formation characteristics of a flame. More soot production was observed with the presence of an inner flame. The increased or decreased soot formation/oxidation rates, the radiation heat loss, and the heating effect of inner flames are most likely to be responsible for the observed instability of laminar diffusion flames.
Flame instability; Laminar diffusion flame; Buoyancy effect; Soot; Radiation heat loss;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 이교우, 정종수, 황정호, "동축 이중 에틸렌 확산화염의 매연 농도분포 및 온도 측정", 대한기계학회 논문집 B권, 제26권, 제3호, 2002, pp. 402-409   과학기술학회마을
2 남연우, 이원남, "Ratio pyrometry를 이용한 매연 입자 온도 계측에 대한 고찰", 제 29회 KOSCO Symposium 논문집, 2004, pp. 124-129
3 이원남, "매연 및 온도 분포에 따른 이색법 확산화염온도의 오차", 산업기술연구, 제3권, 단 국대학교 산업기술연구소, 2003, pp. 63-74
4 $G\ddot{u}lder$, O. L. and Snelling, D. R., "Influence of nitrogen dilution and flame temperature on soot formation in diffusion flames", Combustion and Flame, Vol. 92, 1993, pp. 115-124   DOI   ScienceOn
5 강희곤, 이원남, "확산화염 매연생산에 미치는 회석제 및 산화제의 영향", 대한기계학회 학술대회, 제1권, 제2호, 1996, pp. 548-553
6 이원남, 정용현, "매연입자 온도 측정에 의한 확산화염의 매연생성 특성 해석", 제 19회 KOSCO Symposium, 1999, pp. 241-249
7 남연우, 이원남, "Modulated LII 신호와 이색법을 이용한 매연입자 온도 계측", 제 33회 KOSCO Symposium, 2006, pp. 110-116
8 Sidebotham, G. W. and Glassman, I., "Flame temperature, fuel structure, and fuel concentration effects on soot formation in inverse diffusion flames", Combustion and Flame, Vol. 90, 1992, pp. 269-272   DOI   ScienceOn
9 정종수, 이교우, "동축 이중 확산화염에 대한 중앙 공기제트 유동의 영향", 대한기계학회 학술대회, 제1권, 제2호, 1997, pp. 37-42
10 Thevenin, D., Renard, P. H., Fiechtner, G. J., Gord, J. R. and Rolon, J. C., "Regimes of nonpremixed flame-vortex interactions", Symposium(International) on Combustion, Vol. 28, Issue 2, 2000, pp. 2101-2108
11 Renard, P. H., Thevenin, D., Rolon, J. C. and Candel, S., "Dynamics of flame/vortex interactions", Progress in Energy and Combustion Science, Vol. 26, 2000, pp. 225-282   DOI   ScienceOn
12 Pan, K. L., Qian, J., Law, C. K. and Shyy, W., "The role of hydrodynamic instability in flamevortex interaction", Proceedings of the Combustion Institute, Vol. 29, Issue 2, 2002, pp. 1695-1704   DOI
13 Davis, R. W., Moore, E. F., Santoro, R. J. and Ness, J. R., "Isolation of buoyancy effects in jet diffusion flame experiments", Combustion Science and Technology, Vol. 73, 1990, pp. 625-635   DOI   ScienceOn
14 Katta, V. R., Roquemore, W. M., Menon, M., Lee, S. Y., Santoro, R. J. and Litzinger, T. A., "Impact of soot on flame flicker", Proceedings of the Combustion Institute, Vol. 32, Issue 1, 2009, pp. 1343-1350   DOI
15 Shaddix, C. R., Williams, T. C., Blevins, L. G., and Schefer, R. W., "Flame structure of steady and pulsed sooting inverse jet diffusion flames", Proceedings of the Combustion Institute, Vol. 30, Issue 1, 2005, pp. 1501-1508   DOI
16 남연우, 배승만, 이원남 "화염의 유동장과 온도에 따른 동축류 확산화염의 불안정 특성", 제 40회 KOSCO Symposium 논문집, 2010, pp. 47-52
17 이원남, "동축류 확산화염의 매연생성에 미치는 연료에 첨가된 산화제의 영향", 한국연소학회지, 제3권, 제1호, 1998, pp. 11-19
18 Chen, L. D., Seaba, J. P., Roquemore, W. M. and Goss, L. P., "Buoyant diffusion flames", Symposium(International) on Combustion, Vol. 22, Issue 1, 1988, pp. 677-684