Browse > Article
http://dx.doi.org/10.3795/KSME-B.2002.26.10.1348

OH, PAHs and Soot Ditribution in a Laminar Diffusion Flame Under Oxidizer Deficient Ambience  

Shim, Sung-Hoon (한국기계연구원 열유체환경연구부)
Shin, Hyun-Dong (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.26, no.10, 2002 , pp. 1348-1354 More about this Journal
Abstract
We investigate the flame behavior and spatial distribution of OH, PAHs and soot in a confined buoyant diffusion flame with decrease of the coflowing air flow rate. Direct photographs and Schlieren images represent that flame is Ally occupied by blue flame and becomes unstable, which is partially detached to the fuel nozzle tip in a near extinction flame under extremely reduced oxidizer condition. Laser induced fluorescence profiles clearly shows that OH is still generated in near-extinction flame, although intensity becomes weak with decreasing air flow rate. But soot scattering image cannot be seen any more in an oxidizer deficient ambience and simultaneously the PAHs are widely distributed downstream. These results are due to that a decrease of oxygen concentration in the combustion chamber leads to a temperature drop of flame, as a consequence, to a delay in soot growth and to a expanding of the PAHs, as soot precursors.
Keywords
Planar Laser Induced Fluorescence; OH Radical; Polycyclic Aromatic Hydrocarbons; Soot; Confined Laminar Diffusion Flame; Oxidizer Deficient;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Vander Wal, R. L., Jensen, K. A., and Choi, M. Y., 1997, 'Simultaneous Laser-Induced Emission of Soot and Polycyclic Aromatic Hydrocarbons Within a Gas-Jet Diffusion Flame,' Combust. Flame Vol. 109, pp. 399-414   DOI   ScienceOn
2 Kwon S. J., Cha M. S., Choi M. C., and Chung S. H., 2000, 'Characteristics of Premixed Flames in a Double Concentric Burner,' J. KSME, Vol. 24, No. 12, pp. 1662-1669
3 Glassman, I, 1987, 'Combustion,' Academic Press, Inc., 3rd Edition
4 Smyth, K. C., Shaddix, C. R., and Everest, D. A., 1997, 'Aspects of Soot Dynamics as Revealed by Measurements of Broadband Fluorescence and Flame Luminosity in Flickering Diffusion Flames,' Combust. Flame, Vol. 111, pp 185-207   DOI
5 Walsh, K. T., Fielding, J., Smooke, M. D., and Long, M. B., 2000, 'Experimental and Computational Study of Temperature, Species, and Soot in Buoyant and Nonbuoyant Coflow Laminar Diffusion Flames,' Twenty-Eighth Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, pp. 1973-1979
6 Chen, L. D., Seaba, J. P., Roquemore, W. M., and Goss, L. P., 1988, 'Bouyant Diffusion Flames,' Twenty-Second Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, pp. 677-684
7 Makel, D. B., and Kennedy, I. M., 1994, 'Soot Formation In Laminar Diffusion Flames,' Combust. Sci. Technol., Vol. 97, pp. 303-314   DOI
8 Di Lorenzo, A., D'Alessio, A., Cincotti, V., Masi, S., Menna, P., and Venitozzi, C., 1981, 'UV Absorption, Laser Excited Fluorescence and Direct Sampling in the Study of the Formation of Polycyclic Aromatic Hydrocarbons in Rich $CH_4/O_2$ Flames,' Eighteenth Symposium (International) on Combustion, The Combustion Institute, pp. 485-491
9 Sunderland, P. B., Koylu, U. O. and Faeth, G. M., 1995, 'Soot Formation in Weakly Buoyant Acetylene-Fueled Laminar Jet Diffusion Flames Burning in Air,' Combust. Flame, Vol. 100, pp. 310-322   DOI   ScienceOn