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等体积不同纵横比水滴粒子的光学特性计算

蒋佳丽 张建奇 马向超

蒋佳丽, 张建奇, 马向超. 等体积不同纵横比水滴粒子的光学特性计算[J]. 红外技术, 2021, 43(8): 743-751.
引用本文: 蒋佳丽, 张建奇, 马向超. 等体积不同纵横比水滴粒子的光学特性计算[J]. 红外技术, 2021, 43(8): 743-751.
JIANG Jiali, ZHANG Jianqi, MA Xiangchao. Calculation of Optical Properties of Water Droplets with Equal Volume and Different Aspect Ratios[J]. Infrared Technology , 2021, 43(8): 743-751.
Citation: JIANG Jiali, ZHANG Jianqi, MA Xiangchao. Calculation of Optical Properties of Water Droplets with Equal Volume and Different Aspect Ratios[J]. Infrared Technology , 2021, 43(8): 743-751.

等体积不同纵横比水滴粒子的光学特性计算

基金项目: 

国家自然科学基金 11704298

博士后创新人才支持计划 BX20180233

博士后科学基金 2019M653549

详细信息
    作者简介:

    蒋佳丽(1994-),女,硕士研究生,从事材料和器件光电特性方面的研究。E-mail:jiali2716@163.com

    通讯作者:

    马向超(1989-),男,河南汝州人,副教授,主要研究方向为材料和器件光电特性,E-mail:xcma@xidian.edu.cn

  • 中图分类号: O436.2

Calculation of Optical Properties of Water Droplets with Equal Volume and Different Aspect Ratios

  • 摘要: 不同重力场环境中水滴粒子的形状会偏离球形,为了研究水滴粒子非球形化程度对其光学特性的影响,本文计算了不同方向取向下,等体积不同纵横比水滴粒子在3.0~5.0 μm波段的光学特性。研究发现虽然不同纵横比水滴粒子的光学特性在3.0~5.0 μm波段的变化趋势相似,但具体数值仍然明显依赖于水滴粒子的空间取向和偏离球形程度。总体而言,水滴粒子的吸收截面只在方位角θ较小和波长较短时随其纵横比显著变化;而散射截面、不对称因子和散射相函数则在任意方位角和波长下都对水滴粒子的纵横比有较明显的依赖。因此,由于光学特性对水滴粒子的纵横比有较强的依赖性,由水滴粒子所组成的水雾的辐射传输特性会强烈依赖于水滴粒子的形状。
  • 图  1  椭球水滴粒子模型

    Figure  1.  Ellipsoid water droplet model

    图  2  等体积不同纵横比椭球水滴粒子的吸收截面

    Figure  2.  Absorption cross section of water droplets with equal volume and different aspect ratios

    图  3  等体积不同纵横比椭球水滴粒子的散射截面

    Figure  3.  Scattering cross section of water droplets with equal volume and different aspect ratios

    图  4  等体积不同纵横比椭球水滴粒子的不对称因子

    Figure  4.  Asymmetry factor of water droplets with equal volume and different aspect ratios

    图  5  λ=3.0μm时等体积不同纵横比椭球水滴粒子的散射相函数

    Figure  5.  Scattering phase function of water droplets with equal volume and different aspect ratios when λ=3.0μm

    图  6  等体积不同纵横比椭球水滴粒子取向平均后的光学特性计算结果

    Figure  6.  Calculation results of optical properties of water droplets with equal volume and different aspect ratios after averaging the orientation

    图  7  等体积不同纵横比的椭球水滴粒子取向平均后的散射相函数

    Figure  7.  Scattering phase function of water droplets with equal volume and different aspect ratios after averaging the orientation

    表  1  粒子模型参数

    Table  1.   Particle model parameters

    ε 2a/d 2b/d 2c/d
    1 53.460 53.460 53.460
    0.9 57.350 51.615 51.615
    0.8 62.035 49.628 49.628
    0.7 67.810 47.467 47.467
    0.6 75.150 45.090 45.090
    0.5 84.864 42.431 42.431
    0.4 98.475 39.390 39.390
    下载: 导出CSV

    表  2  水滴的复折射率

    Table  2.   Refractive index of water droplets

    λ/μm n k
    3.0 1.371 0.27200
    3.2 1.478 0.09240
    3.4 1.420 0.01950
    3.6 1.385 0.00515
    3.8 1.364 0.00340
    4.0 1.351 0.00460
    4.2 1.342 0.00688
    4.4 1.334 0.01030
    4.6 1.330 0.01470
    4.8 1.330 0.01500
    5.0 1.325 0.01240
    注:n是复折射率的实部,k是复折射率的虚部
    Note: n is the real part of the refractive index, k is the imaginary part of the refractive index
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-10-19
  • 修回日期:  2020-12-16
  • 刊出日期:  2021-08-20

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