For the sub-micro particles generated in the combustion process, the main reason for the change of their size distribution is the coagulations caused by their Brownian motion.

• 摘要对于燃烧过程中生成的超细颗粒，其自身的布朗运动引起的细颗粒之间的碰撞以及与较大颗粒之间的碰撞是改变其尺寸分布的主要因素。