二维变折射率介质辐射传递的近似模型  

APROXIMATE RADIATIVE TRANSFER MODELS OF A TWO DIMENSIONAL GRADED INDEX MEDIUM

作　　者：黄勇[1] 杨敏[1] 王浚[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083

出　　处：《工程热物理学报》2009年第2期276-278,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50606003);航空基金项目(No.2007ZA51006)

摘　　要：发展了二维梯度折射率介质热辐射传递求解的两种近似模型,线性折射率bar模型和混合bar模型。对于辐射能传递路径的求解,涉及到四个坐标系的转换:系统坐标系、网格坐标系、网格旋转坐标系和散射的当地坐标系。同时假设辐射能在每个网格内是在平面内传递。通过这两个模型的建立和新的假设条件,对于二维梯度折射率介质的热辐射传递求解的一系列问题均可较为容易地求解。Two approximate models are presented for the solution of radiative transfer in two- dimensional graded index medium, the linear refractive index bar model and the mixed bar model. Four coordinate systems are involved in the calculation, named as global coordinate system, mesh coordinate system, mesh rotating coordinate system and local coordinate system. We suppose that the radiative bundle have a two-dimensional trajectory in every mesh. Based on the hypothesis and the two models, solutions of the radiative transfer in a two-dimensional graded index medium can be obtained more easily.

关 键 词：辐射传递 梯度折射率 线性折射率bar模型 混合bar模型 

分 类 号：TK124[动力工程及工程热物理—工程热物理]