半透明梯度折射率介质内辐射熵传递方程及其数值模拟(英文)  

Radiative Entropy Transfer Equation and Numerical Computation of Radiative Entropy Generation in Semitransparent Graded Index Medium

作　　者：刘林华[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《计算物理》2009年第2期267-274,共8页Chinese Journal of Computational Physics

基　　金：Supported by the National Natural Science Foundation of China(50836002);the Science Fund of Heilongjiang Province for Distinguished Young Scholars(No.JC04-03).

摘　　要：在非相干辐射条件下,基于Planck光谱辐射熵强度定义,导出半透明梯度折射率介质内光谱辐射熵传递方程,以及局部辐射熵产率理论表达式.基于离散坐标法对辐射熵传递方程进行数值求解.以一维半透明梯度介质平板为例,对辐射熵方程及其算法进行验证.平板整体无因次辐射熵产的计算结果与宏观热力学定律的结果一致.With hypothesis that radiation is incoherent, based on Planck＇ s definition of radiative entropy, radiative entropy transfer equation and local radiative entropy generation in semitransparent graded index medium are derived. A calculation method based on discrete-ordinates approach is used to solve radiative entropy transfer equation in semitransparent graded index medium. A one-dimensional slab system filled with semitransparent graded index medium is taken as an example to verify the radiative entropy transfer equation and the calculation method. Numerical results of dimensionless radiative entropy generation of the slab system agree well with entire thermodynamics analysis.

关 键 词：辐射熵传递方程 辐射熵产 离散坐标法 半透明介质 梯度折射率 

分 类 号：TK124[动力工程及工程热物理—工程热物理]