论文部分内容阅读
基于颗粒群平衡理论,构建一维层流预混火焰中碳烟颗粒动力学演化过程的数学模型.该模型包含了颗粒的成核、凝并、表面生长和氧化等过程,采用Monte Carlo随机算法进行求解.结合详细的化学反应机理,搭建了求解碳烟颗粒尺寸分布的计算平台.分析了乙炔层流预混火焰中添加二氧化碳和水两种组分时对碳烟生成的影响,获得了0%、20%和40%3组不同添加比例下的碳烟尺寸分布.结果表明,在当量比为2.5且保持不变的情况下,添加二氧化碳和水能够有效降低碳烟的生成,其中添加40%水时对碳烟的抑制效果更加明显;同时,二氧化碳和水的添加使得大粒径碳烟颗粒数量降低.
Based on the theory of particle swarm equilibrium, a mathematic model of kinetic evolution of soot particles in one-dimensional laminar premixed flame is established. The model includes nucleation, condensation, surface growth and oxidation of particles. Monte Carlo stochastic algorithm The calculation platform for the soot particle size distribution was established based on the detailed chemical reaction mechanism.The influence of the addition of carbon dioxide and water on the generation of soot was analyzed, %, 20% and 40% respectively.The results showed that the addition of carbon dioxide and water could effectively reduce the generation of soot when the equivalence ratio was 2.5 and kept unchanged, and the addition of 40 % Of water on the soot inhibition effect is more obvious; the same time, the addition of carbon dioxide and water make the number of large particle size soot particles decreased.