部分预混对扩散火焰中碳烟成核的影响

Influence of Partial Premixing on the Sooting Limits of Diffusion Flames

通过测量扩散火焰中开始形成碳核时的临界气动变形率 Kp,对丙烷中加入空气、氮气和氧气时的碳烟生成进行了实验研究 ,介绍了利用碳烟颗粒和 PAH对偏振激光的散射性能差异测量 Kp 的方法 ;通过比较不同条件下的 Kp,得出结论 :部分预燃具有遏制扩散燃烧中碳烟成核的作用 ,有利于减少碳烟的生成。

An experimental investigation has been conducted on the influence of nitrogen,oxygen and air addition on the propane diffusion flames by measuring the soot particle inception limits.An experiment method for the sooting limit measurement based on the laser scattering difference between the soot particles and PAH is introduced.Comparing the sooting limits between different concentrations of air,nitrogen and oxygen in the propane,the results show that appropriate amount of oxygen or air added to the propane diffusion flames may reduce soot formation.