非均匀介质红外辐射传输模型  

INFRARED RADIATION TRANSFER MODEL FOR AN INHOMOGENEOUS MEDIUM

作　　者：易红亮[1] 罗剑峰[2] 贺志宏[1] 甄仌[1,3] 谈和平[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 [2]国防科学技术大学理学院,湖南长沙410073 [3]哈尔滨商业大学土木与制冷工程学院,黑龙江哈尔滨150028

出　　处：《工程热物理学报》2009年第4期645-648,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50806018)

摘　　要：本文建立镜反射不透明表面下,非均匀光学物性纯吸收性介质内的红外辐射传输模型。红外辐射在折射率连续变化的介质内沿曲线传输。将非均匀介质沿厚度方向离散成n个物性均匀的等温微层,每个微层内辐射沿直线传播,光滑曲线传输路径即离散成首尾相连的折线系列。采用多层辐射传输模型,利用射线踪迹法建立非均匀介质内的红外辐射传输模型。在多层模型中,相邻两微层间的界面引入折射/全反射判据,避免了界面处的积分奇异现象和原本不存在的界面反射现象。An infrared radiation transfer model is developed for an inhomogeneous purely absorbing medium with opaque specular surfaces. Infrared radiation transfers in a curve within a medium having a continuously variable refractive index. The inhomogenous medium is divided into n homogenous isothermal sublayers and the radiation transfers in a straight line in each sublayer. Thus the curve trajectory for radiation is discretized as a series of polylines. Using a multilayer radiative transfer model, an infrared radiation transfer model is built for the inhomogenous medium by a ray-tracing method. The multilayer model introduces a criterion for refraction/total reflection at the interfaces between neighboring sub-layers, avoiding the integral singulartity and reflection at physically inexistent interfaces.

关 键 词：非均匀介质 多层模型 射线踪迹法 辐射传递系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]