中文摘要：

建立了激光诱导炽光技术测试过程的数学模型，对激光加热过程中碳烟粒子的粒径和温度的变化进行计算，并基于模型重点考察了入射激光波长、入射激光能量密度及初始粒径对碳烟粒子加热过程的影响．结果表明，入射激光波长选择532nm是比较好的选择，激光能量密度对激光诱导炽光技术的测试过程的影响很大，可以利用温度衰减速率推断碳烟粒子的初始粒径；该数学模型的建立及数值模拟表明运用激光诱导炽光技术可以推断碳烟初始粒径．

英文摘要：

The model of laser induced incandescence（LII） technique is established in this research. It plays an essential role in inferring the primary soot particle size. The variations of the particle size and temperature during heating process were calculated. The effects of factors, such as laser wavelength, laser fluence and initial diameter of the particles, on the heating process were then investigated. It was found that, the laser wavelength of 532 nm was to be a better choice, the laser fluence had a significant effect on the process and the particle temperature decay rate could be used to infer the primary particle size. The presented model and simulation results would be very useful for applications of LII to deduce soot particle size.