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偏振是电磁辐射的重要特性之一。考虑偏振效应的辐射传输的分析和计算需要基于以Stokes参量为传输变量的矢量辐射传输方程。由于考虑偏振效应时辐射换热计算要复杂得多,传统的辐射换热计算过程中一般忽略偏振效应。而完全忽略偏振效应对辐射换热的分析可能会引起较大的误差。本文通过数值求解矢量辐射传递方程,以平行光照射一维散射平板为例,研究由Mie散射相矩阵引起的偏振效应对辐射换热的影响。研究表明,入射光的偏振态和散射相矩阵的偏振效应是耦合在一起对辐射换热的分析产生影响的。当它们具有强的耦合作用时,即偏振态显著影响散射后的能量分配,将会引起基于标量辐射传输的辐射热流预测结果出现较大偏差。
Polarization is one of the important characteristics of electromagnetic radiation. The analysis and calculation of the radiation transmission considering the polarization effect requires a vector radiation transmission equation based on the Stokes parameter as the transmission variable. Since the radiation heat transfer calculation is much more complicated when considering the polarization effect, the traditional radiation heat transfer calculation process generally neglects the polarization effect. Ignoring the polarization effect completely, the analysis of radiation heat transfer may cause a large error. In this paper, by numerical solution of the vector radiation transfer equation, the parallel light irradiation of one-dimensional scattering plate is taken as an example to study the influence of polarization effect caused by Mie scattering phase matrix on radiation heat transfer. The results show that the polarization effect of the incident light and the matrix of the scattering phase are coupled together to influence the analysis of radiative heat transfer. When they have a strong coupling effect, that is, the polarization states significantly affect the energy distribution after scattering, which will cause a large deviation of the radiative heat flux prediction results based on the scalar radiation transmission.