Measuring particle size and concentration of non-spherical particles by combined light extinction and scattering method

被引：18
作者：
Jiang, Meng [1 ]
Liu, Xiaowei [1 ]
Han, Jinke [1 ]
Zhou, Zijian [1 ]
Xu, Minghou [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
来源：
MEASUREMENT | 2021年 / 184卷 / 184期
基金：
中国国家自然科学基金;
关键词：
Combined extinction and scattering; Particulate mass concentration; Shape deformation; Extinction coefficient; PARTICULATE-EMISSIONS; COMPUTATIONS; OPACITY;
D O I：
10.1016/j.measurement.2021.109911
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Combined extinction and scattering method has been proved to be reliable in measuring particle size and concentration for spherical silica (SS) particles. In this study, the feasibility of this method for non-spherical particles is investigated by optical simulations and aerosol measurements with irregularly-shaped silica (ISS) particles. According to optical simulations, the extinction-to-scattering ratio Res and extinction coefficient Kext are functions of volume-equivalent radius Rgv for prolate spheroids. More fluctuations were observed in the correlation between the experimentally-derived Res and aerodynamic size Rav for ISS than that for SS. Deviation of the inversed Rav' from the experimental Rav for ISS is higher than that for SS due to the extra fluctuations in the correlation between Res and Rav. But the relative error between the size-corrected extinction coefficient Kext' from the nominal value for ISS limits in +/- 20% in the investigated size range.
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页数：10
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