随机取向六角形冰晶粒子的散射特性研究

类成新

随机取向六角形冰晶粒子的散射特性研究

类成新^,

山东理工大学理学院,山东淄博255049

详细信息

通讯作者:
类成新(1976-)，男，山东新泰人，讲师，硕士，主要从事目标激光散射特性研究工作。

中图分类号: TN249
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出版历程
- 刊出日期: 2010-09-14

Scattering property of randomly oriented hexagonal ice crystals

LEI Cheng-xin^,

School of Science,Shandong University of Technology,Zibo 255049,China

摘要

摘要: 利用离散偶极子近似方法研究卷云中随机取向六角形冰晶粒子的取向比对散射特性的影响，数值计算了在小尺度范围内随机取向六角形冰晶粒子的散射特征量，包括散射相函数、消光效率因子、不对称因子、单次散射反照率和线偏振度。研究表明：取向比对随机取向六角形冰晶粒子散射特征量的影响比较明显，并且此影响随着粒子尺度参数的变化而变化，与入射波长无关；相同尺度参量和不同取向比粒子的散射相函数的角分布曲线均有一个交点，并且随着粒子尺度参量的增加，交点所对应的散射角度值逐渐向小角度方向移动。此研究结果为气溶胶粒形检测和识别提供了理论依据。
- 散射特性 /
- 离散偶极子近似方法 /
- 取向比 /
- 六角形冰晶粒子
Abstract: The influence of the aspect ratio on the scattering properties of small size hexagonal ice crystals in cirrus cloud is studied by using the discrete dipole approximation (DDA) method. The scattering properties such as phase function, extinction efficiency, asymmetrical parameter, single-scattering albedo and degree of linear polarization are computed. The results show that the influence of the aspect ratio on the scattering properties of randomly oriented hexagonal ice crystals is significant, and it varies with the size of the particles, but it is independent of the incident wavelength. In addition, there is an intersection point in the profiles of phase function of hexagonal ice crystals with the same sizes but different aspect ratios, and this point will extend forward with the increase of particle size. The result provides a theoretical basis for the object acquisition and identification.
- scattering property /
- discrete dipole approximation (DDA) method /
- aspect ratio /
- hexagonal ice crystals

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参考文献(1)

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文章访问数: 2215
HTML全文浏览量: 124
PDF下载量: 796
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随机取向六角形冰晶粒子的散射特性研究

通讯作者:
类成新(1976-)，男，山东新泰人，讲师，硕士，主要从事目标激光散射特性研究工作。

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Scattering property of randomly oriented hexagonal ice crystals

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随机取向六角形冰晶粒子的散射特性研究

通讯作者: 类成新(1976-)，男，山东新泰人，讲师，硕士，主要从事目标激光散射特性研究工作。

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Scattering property of randomly oriented hexagonal ice crystals

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通讯作者:
类成新(1976-)，男，山东新泰人，讲师，硕士，主要从事目标激光散射特性研究工作。