CAJ | 학술논문

采用离散偶极子近似方法对随机取向混合凝聚粒子在内外混合状态下的光学截面、单次散射反照率以及非对称因子等辐射特性参量进行了数值计算，详细讨论了混合方式、混合比等因素对混合凝聚粒子辐射特性的影响。研究表明，混合凝聚粒子的混合方式对非对称因子的影响非常大，对散射截面和单次散射反照率的影响比较大，但是对吸收和消光截面的影响不明显。随着凝聚粒子中基本粒子粒径和数量的增大，非对称因子、散射截面以及单次散射反照率受混合方式的影响变得愈加明显。此外，混合比的变化对不同混合状态下的凝聚粒子的辐射特性参量均存在不同程度的影响，并且此影响随着基本粒子粒径和数量的变化而显著变化。混合比相同情况下，所有外混合凝聚粒子的散射截面均大于内混合凝聚粒子的散射截面，而单次散射反照率却相应减小。
채용리산우겁자근사방법대수궤취향혼합응취입자재내외혼합상태하적광학절면、단차산사반조솔이급비대칭인자등복사특성삼량진행료수치계산，상세토론료혼합방식、혼합비등인소대혼합응취입자복사특성적영향。연구표명，혼합응취입자적혼합방식대비대칭인자적영향비상대，대산사절면화단차산사반조솔적영향비교대，단시대흡수화소광절면적영향불명현。수착응취입자중기본입자립경화수량적증대，비대칭인자、산사절면이급단차산사반조솔수혼합방식적영향변득유가명현。차외，혼합비적변화대불동혼합상태하적응취입자적복사특성삼량균존재불동정도적영향，병차차영향수착기본입자립경화수량적변화이현저변화。혼합비상동정황하，소유외혼합응취입자적산사절면균대우내혼합응취입자적산사절면，이단차산사반조솔각상응감소。
The discrete dipole approximation method was used to compute the radiative characteristic parameters including the optical cross-sections, single-scattering albedo and asymmetrical parameter for a variety of mixed agglomerates in different mixing states at a visible wavelength 0.55μm. It is shown that the influence of the mixing states on the asymmetrical parameter is very great, and that on the scattering cross section and single-scattering albedo is heavy, while that on the absorption and extinction cross sections is not obvious. The influence of mixing patterns on the asymmetrical parameter, scattering cross section and single-scattering albedo is becoming more obvious with the increase of the size of agglomerates. The mixture ratios has an obvious effect on the radiative characteristic quantities of agglomerates in internal and external mixing states, and the effect varies with the monomer diameters, and number of monomers in the agglomerates. The scattering cross-sections of external mixture of agglomerates are larger than those of their internally mixed counterparts, but the single-scattering albedo decreases accordingly at the same mixture ratios.