CO气相反应对碳颗粒燃烧的影响——连续膜理论的一种简化模拟方法

THE INFLUNCE OF CO OXYDATION ON THE COMBUSTION OF CARBON PARTICLE ——A SIMPLE METHOD TO IMITATE THE CONTINUOUS-FILM MODEL

本文提出了一种新的考虑了颗粒边界层内CO气相反应效应的碳颗粒燃烧简化模型——移动火焰锋面(MFF)模型。该模型成功地实现了在“碳颗粒着火时表面等效生成物为CO_2”与“扩散扩制时全部成为CO”这两个极限之间的各种中间燃烧工况的连续转变,并很好地预报了Young等人测量得到的褐煤碳颗粒表面温度超过现有单膜模型理论极限值的实验结果。

A Moving Flame Front Model for the combustion of carbon particle, which takes the affect of CO oxydation in the boundary layer of it into account, was proposed by the authors in the paper. By using the model, the continuous transition of the effective combustion product from CO2 under the ignition condition to CO under the condition of diffusion control was realized successfully, and a good prediction to Young's experimental data [4] , which could not be explained by the normal single-film model, was obtained.