Numerical study on soot formation in outwardly propagating, iso-octane, rich, cellular flames
Numerical study on soot formation in outwardly propagating, iso-octane, rich, cellular flames
复制标题
DOI：
10.1016/j.fuel.2021.121520
复制
发表时间：
2021-12
期刊：
影响因子：
7.4
通讯作者：
T. Ikeda;Yoshihiro Tsuruda;H. Watanabe;R. Kurose;T. Kitagawa
中科院分区：
文献类型：
--
作者：
T. Ikeda;Yoshihiro Tsuruda;H. Watanabe;R. Kurose;T. Kitagawa
通过二维数值模拟研究了当量比为1.4、1.6和1.8的异辛烷不稳定胞状火焰向外传播过程中碳烟的形成。观察到蜂窝状火焰结构的形成作为火焰不稳定性的指标。此外，发现烟灰形成增强。瓣尖区域的火焰拉伸率为负;相反，凸形区域的火焰拉伸率为正。这种拉伸速率的差异导致较低的火焰前缘温度和较低的温度梯度。结果还表明，在这些地区的温度差异可能会影响碳烟表面的生长，这是依赖于在这些地区的C2 H2浓度。
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 C2H2concentration in these areas.