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Influence of temperature and hydroxyl concentration on incipient soot formation in premixed flames

✍ Scribed by Mark M. Harris; Galen B. King; Normand M. Laurendeau

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
805 KB
Volume
64
Category
Article
ISSN
0010-2180

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✦ Synopsis

Critical equivalence ratios (~c) have been measured as a function of temperature (1600-1880K) for premixed flames at atmospheric pressure. The five fuels studied are methane, ethane, propane, ethylene, and acetylene. The flames were stabilized on a flat flame burner and the temperatures were measured using sodium D-line reversal. A linear relationship is found between In 6c and 1/Tfor each fuel. Based on a global kinetic model in which soot precursors are formed by fuel pyrolysis and oxidized by OH, a predictive correlation has been developed which shows the influence of temperature, OH concentration, and C/H ratio on sooting tendency. This correlation describes all of the measured q~Β’ versus temperature data, suggesting that the overall mechanism of soot formation is similar among aliphatic fuels.

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