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. Using the molecular (A3) as the nucleation and deposition component, the soot nucleation and surface deposition model was reconstructed. Combining with the detailed chemical reaction mechanism, the low pressure acetylene / oxygen / argon laminar flow premixed flame was simulated to obtain the flame The main gas phase mole fraction and soot particle volume fraction, particle size and other relevant information.Compared with the experimental data, the simulation results show that the modified soot model can predict the mole fraction of the main gas phase components more accurately The model is more accurate for the calculation of number density, volume fraction and surface area of ​​soot particles, which verifies the effectiveness of the model.