摘要
本文首先利用T矩阵方法计算了复折射率吸收指数和折射指数变化时的椭球粒子和Chebyshev粒子在不同等效尺度参数下的光散射特性,并与等效的球形粒子的光散射结果进行了比较;然后分析以上两种类型非球形粒子散射特性之间的关系。结果表明:椭球粒子和Chebyshev粒子的散射特性与等效球形粒子的散射特性存在着差别,粒子的形状越偏离球形,这种差别就越大;复折射率折射指数的变化对非球形散射效率因子的影响要比吸收指数的影响更大一些;当等效尺度参数相同时,椭球粒子与等效球形粒子的散射效率因子的差别要远远大于Chebyshev粒子与等效球形粒子散射效率因子之间的差别。
The scattering characteristics of ellipsoid particles and Chebyshev particles are calculated using T matrix in different scale equivalent parameters when absorption index and refractive index changes. Their scattering characteristics are compared with the equivalent spherical particles. The relationships of scattering characteristics between non-spherical particles are presented in the end. The results indicate that there are many differences for the the scattering characteristics between non-spherical particles and the equivalent spherical particles. The more deviation in the shape from the spherical particles, the more differences will appear. The influence of refractive index to the scattering efficiency factor is bigger than absorbption index.The differences of scattering efficiency factor between ellipsoid particles and the equivalent spherical particles are far greater than that between Chebyshev particles and the equivalent spherical particles.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第8期1366-1368,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50806016)
武器装备预研基金重点项目
关键词
T矩阵法
非球形粒子
光散射
T matrix method
nonspherical particle
light scattering
