菲分子作为成核和沉积组分的碳烟生长研究

Soot formation study of phenanthrene as nucleation and condensation species

将菲分子(A3)作为成核和沉积组分,重建了碳烟成核和表面沉积模型,结合详细的化学反应机理,模拟了低压乙炔/氧气/氩气层流预混火焰,获得火焰中主要气相组分摩尔分数和碳烟颗粒体积分数、粒径等相关信息.通过将模拟值与实验值对比分析,结果表明:采用改进的碳烟模型可以较为准确地预测主要气相组分的摩尔分数,该模型对碳烟颗粒的数密度、体积分数和表面积的计算更为准确,验证了模型改进的有效性.

The purpose of this research work is to simulate low-pressure C2H2/O2/AR laminar premixed flames. Using an improved detailed soot model, phenanthrene （A3） as nucleation and con- densation species were considered. Coupled with detailed chemical kinetic mechanism, mole fraction of major species and the soot volume fraction, diameter were obtained in the flames. Results show that mole fraction of major species are accurately predicted based on the improved detailed soot model. Meanwhile, the model can better predict soot number density, volume fraction and surface area, so the improved soot model is valid.