INVERSION OF SPHEROID PARTICLE SIZE DISTRIBUTION IN WIDER SIZE RANGE AND ASPECT RATIO RANGE

The non-spherical particle sizing is very important in the aerosol science, and it can be determined by the light extinction measurement. This paper studies the ef-fect of relationship of the size range and aspect ratio range on the inversion of spheroid particle size distribution by the dependent mode algorithm. The T ma-trix method and the geometric optics approximation method are used to calculate the extinction efficiency of the spheroids with different size range and aspect ra-tio range, and the inversion of spheroid particle size distribution in these differ-ent ranges is conducted. Numerical simulation indicates that a fairly reasonable representation of the spheroid particle size distribution can be obtained when the size range and aspect ratio range are suitably chosen. Key words: light extinction, spheroid, inversion, size range, aspect ratio rang