Transition morphology of deposits on SiC fibers in propane/air laminar diffusion flames

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The morphologies of deposits on 15-mum diameter silicon carbide (SiC) fibers have been investigated with a scanning electron microscope (SEM) in co-flowing, propane/air laminar diffusion flames. The average size of the soot particles deposited in the luminous flame edge is strongly dependent on their position in a typical unconfined heavily sooting flame, but this position dependence is not discernible in a confined flame under a reduced oxidizer condition. The transition to soot from the condensed-phase deposits could be observed in the radial deposition of sooting flames. Two kinds of processes that mature soot particles are produced exist in a heavily sooting flame: one is the transition from the condensed-phase deposits; the other is the aggregation of the smaller soot particles (or chains of them) carried along the particle path line. The fiber-like structures, which are about 10-nm thick, were found outside the luminous flame surface, and are thought to be made under high temperature oxidation environment. (C) 2002 by The Combustion Institute.
Publisher
ELSEVIER SCIENCE INC
Issue Date
2002-10
Language
English
Article Type
Article
Keywords

SOOT FORMATION; PARTICLES; GROWTH; OXYGEN

Citation

COMBUSTION AND FLAME, v.131, no.1-2, pp.210 - 218

ISSN
0010-2180
DOI
10.1016/S0010-2180(02)00408-X
URI
http://hdl.handle.net/10203/84636
Appears in Collection
ME-Journal Papers(저널논문)
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