TY - JOUR
T1 - Numerical study on soot formation in outwardly propagating, iso-octane, rich, cellular flames
AU - Ikeda, Takashi
AU - Tsuruda, Yoshihiro
AU - Watanabe, Hiroaki
AU - Kurose, Ryoichi
AU - Kitagawa, Toshiaki
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP19H02080 .
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Soot formation in outwardly propagating iso-octane rich unstable cellular flames were investigated by means of a two-dimensional numerical simulation at mixture equivalence ratios of 1.4, 1.6, and 1.8. The formation of a cellular flame structure was observed as an indicator of flame instability. In addition, soot formation was found to be enhanced. The cusp area had a negative flame stretch rate; in contrast, the convex area had a positive flame stretch rate. This difference in stretch rate caused a lower flame front temperature and lower temperature gradient. It was also revealed that a difference in temperature in these areas might affect the soot surface growth, which was dependent on the C2H2 concentration in these areas.
AB - Soot formation in outwardly propagating iso-octane rich unstable cellular flames were investigated by means of a two-dimensional numerical simulation at mixture equivalence ratios of 1.4, 1.6, and 1.8. The formation of a cellular flame structure was observed as an indicator of flame instability. In addition, soot formation was found to be enhanced. The cusp area had a negative flame stretch rate; in contrast, the convex area had a positive flame stretch rate. This difference in stretch rate caused a lower flame front temperature and lower temperature gradient. It was also revealed that a difference in temperature in these areas might affect the soot surface growth, which was dependent on the C2H2 concentration in these areas.
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U2 - 10.1016/j.fuel.2021.121520
DO - 10.1016/j.fuel.2021.121520
M3 - Article
AN - SCOPUS:85111560945
VL - 305
JO - Fuel
JF - Fuel
SN - 0016-2361
M1 - 121520
ER -