Numerical study on soot formation in outwardly propagating, iso-octane, rich, cellular flames

FUEL

卷:305

Article

Ikeda, Takashi¹  Tsuruda, Yoshihiro¹  Watanabe, Hiroaki^2,3  Kurose, Ryoichi⁴  Kitagawa, Toshiaki⁵ 

[1] Kyushu Univ, Grad Sch Engn, Dept Mech Engn, Fukuoka 8190395, Japan

[2] Kyushu Univ, Fac Engn Sci, Dept Adv Environm Sci & Engn, Fukuoka 8168580, Japan

[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res, Fukuoka 8168580, Japan

[4] Kyoto Univ, Dept Mech Engn & Sci, Kyoto 6158540, Japan

[5] Kyushu Univ, Fac Engn, Dept Mech Engn, Fukuoka 8190395, Japan

关键词: Soot formation;    Direct numerical simulation;    Outwardly propagating flame;    Iso-octane;    Flame instability;   

DOI  :  10.1016/j.fuel.2021.121520

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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