0.55μm激光在复杂组分雾霾中的散射传输特性

Scattering and Transmission Characteristics of 0.55μm Laser in Haze with Complex Components

基于典型雾霾粒子的消光、吸收、散射截面、不对称因子参量和粒径分布函数的分析,运用蒙特卡罗方法研究了不同组分、不同混合方式的雾霾介质中波长0.55μm激光的传输散射特性,比较了典型污染物颗粒介质对光的透射率影响。研究表明,同等浓度下,硫酸铵介质对光的透射率最高,碳溶胶介质的透射率最低,且雾霾的透射率小于灰霾透射率。此外,对不同混合状态簇团粒子组成介质的透射率比较分析表明,典型污染物粒子外混合状态和内混合状态对光的衰减性几乎相同,而雾霾介质中水组分的分布对光的透射率有明显的影响。

Based on the analysis of extinction,absorption,scattering cross sections,asymmetry factor parameters and particle size distribution function of several typical kinds of haze particles,the transmission and scattering characteristics of 0.55μm laser in haze media with different components and different mixing modes are studied by Monte Carlo method,and the effects of several typical kinds of pollutant particles on light transmittance are also compared.The results show that at the same concentration,the transmittance in ammonium sulfate medium is the highest and that in carbon aerosol medium is the lowest,and the transmittance in fog is less than that in haze.The comparative analysis of the transmittance in the medium composed of cluster particles in different mixed modes shows that the attenuation of light by typical pollutant particles in external mixing mode or in internal mixing mode is almost the same,while the distribution of water components in the medium has an obvious effect on the transmittance of laser beam.