碳纤维结构排布对其辐射特性影响的分析

doi:10.11949/0438-1157.20190610

摘要/Abstract

摘要：

为了研究碳纤维的光谱辐射特性，利用时域有限差分法模拟计算了不同排布方式下的碳纤维辐射特性。结果表明：在2D随机排布方式下等半径碳纤维散射因子随着碳纤维含量的降低而减小，当含量降低17.12%，散射因子的最大值降低35%；在2D随机排布方式下非等半径碳纤维，不仅碳纤维含量对材料辐射特性有影响，碳纤维圆柱体的半径也影响其辐射特性，在2.5～3.5 μm波段同含量下碳纤维根数由26增加至56时散射因子增大20%；而且碳纤维3D随机排布方式和2D随机排布的辐射特性偏差较大，2D排布模型代替3D随机排布模型会使碳纤维吸收截面偏差40%。

关键词: 碳纤维, 辐射特性, 时域有限差分法

Abstract:

In order to study the spectral radiation characteristics of carbon fiber, the finite difference time-domain method is used to investigate the radiation characteristics of carbon fiber in different configurations. The results show that the scattering factor of carbon fiber with the same radius in 2D random distribution decreases with the decrease in content of carbon fiber. When the content decreased by 17.12%, the maximum value of the scattering factor is decreased by 35%. Under the 2D random distribution of non-uniform radius carbon fiber, besides of the influence of carbon fiber content on the material’s radiation characteristics, the number of carbon fiber particles with small radius under the same content will increase the scattering factor by 20% in the 2.5—3.5 μm band. Compared with 2D random arrangement, 3D random arrangement can significantly enhance the radiation characteristics of carbon fiber.

Key words: carbon fiber, radiation characteristics, finite difference time-domain method

中图分类号:

TK 124

殷金英,韩江月,祁彩辉. 碳纤维结构排布对其辐射特性影响的分析[J]. 化工学报, 2019, 70(S2): 356-362.

Jinying YIN,Jiangyue HAN,Caihui QI. Analysis of influence of carbon fiber structure arrangement on its radiation characteristics[J]. CIESC Journal, 2019, 70(S2): 356-362.

图/表 7

图1 2D随机排布等半径碳纤维物理模型

Fig.1 Random distribution 2D model for carbon fibers with uniform radius

图2 2D随机排布非等半径碳纤维物理模型

Fig.2 Random distribution 2D model for carbon fibers with non-uniform radius

图3 3D随机排布碳纤维物理模型

Fig.3 Random distribution 3D model for carbon fibers

图4 2D随机排布下散射因子与吸收因子随波长的变化

Fig.4 Variations of scattering and absorption factors as a function of wavelength for 2D randomly arranged carbon fiber

图5 等半径与非等半径碳纤维散射因子与吸收因子对比

Fig.5 Comparisons of scattering and absorption factors for carbon fibers with uniform and non-uniform radius

图6 相同含量下碳纤维数量对散射因子和吸收因子的影响

Fig.6 Effect of carbon fiber content on scattering factors and absorption factors under the same content

图7 3D随机排布与2D随机排布下散射截面与吸收截面对比

Fig.7 Comparison of radiation characteristics in 3D random scheduling and 2D random scheduling

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