The evolution of particle size distribution function (PSDF) of soot in premixed flames of benzene and toluene was studied on a burner stabilized stagnation (BSS) flame platform. The cold gas velocities were changed to hold the maximum flame temperatures of different flames approximately constant. The PSDFs of all the test flames exhibited a bimodal distribution, i.e., a small-size nucleation mode and a large-size accumulation mode. It was observed that soot nucleation and particle growth in the benzene flame were stronger than those in the toluene flame at short residence times. At longer residence times, the PSDFs of the two flames were similar, and the toluene flame showed a larger particle size distribution range and a higher particle volume fraction than the benzene flame.

中文翻译：

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苯和甲苯的轻度烟灰预混火焰中的烟尘尺寸分布

在燃烧器稳定滞止（BSS）火焰平台上研究了苯和甲苯预混火焰中烟灰的粒度分布函数（PSDF）的演变。改变冷气速度以保持不同火焰的最高火焰温度大致恒定。所有测试火焰的PSDF均表现出双峰分布，即小尺寸成核模式和大尺寸聚集模式。观察到，在短停留时间下，苯火焰中的烟尘成核和颗粒生长强于甲苯火焰中的烟尘成核和颗粒生长。在更长的停留时间下，两个火焰的PSDF相似，并且甲苯火焰显示出比苯火焰更大的粒径分布范围和更高的颗粒体积分数。