基于多角度的非球形颗粒物质量浓度研究

Study of Non-spherical Particle Mass Concentrations Based on Multiple Angles

空气环境中的大量细微颗粒物具有严重危害。颗粒物的形态各异,球形和非球形粒子散射光的方式不同。通过设计的多角度散射测量装置,研究了4种不同形态粒子的散射矩阵,结果表明不同形态的非球形粒子具有相似的散射函数,但颗粒物形态、表面粗糙度等形态会对散射光强度产生明显影响。球形粒子的散射效率比非球形粒子高,粒子形态会降低颗粒物的散射强度。不同类型、不同形状的非球形颗粒可以用其他类似球形颗粒模拟。

Large amounts of fine particulate matter in the air environment are a serious hazards.Particulate matter has different morphologies and spherical and non-spherical particles scatter light in different ways.In this paper,the scattering matrices of four different morphological particles are investigated by means of a designed multi-angle scattering measurement device.The results show that different morphologicalnon-spherical particles have similar scattering functions,but morphology such as particle morphology and surface roughness can have a significant effect on the intensity of scattered light.The scattering efficiency of spherical particles is higher than that of non-spherical particles,and the particle morphology will reduce the scattering intensity of the particulate matter.Different types and shapes of non-spherical particles can be simulated with other similar spherical particles.