用射线踪迹法解黑表面矩形介质耦合换热  

SOLUTION TO COUPLED HEAT TRANSFER IN A RECTANGULAR MEDIUM WITH BLACK SURFACES WITH RAY TRACING METHOD

作　　者：罗剑峰[1] 易红亮[2] 甄仌[3] 谈和平[2] 

机构地区：[1]国防科大理学院,湖南长沙410073 [2]哈尔滨工业大学能源学院,黑龙江哈尔滨150001 [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》2010年第1期90-93,共4页Journal of Engineering Thermophysics

基　　金：全国优秀博士学位论文作者基金资助(No.200438)

摘　　要：本文用射线踪迹-节点分析法研究了二维黑体表面矩形、各向同性散射半透明介质内辐射与导热瞬态耦合换热。采用全隐格式的有限差分法离散二维瞬态微分能量方程,用辐射传递系数来表示辐射源项,结合谱带模型并采用射线踪迹法求解辐射传递系数。采用Patankar线性化方法将辐射源项及不透明边界条件线性化,并采用附加源项法处理边界条件,运用ADI方法求解名以上的线性化方程组,从而解得二维矩形介质内的瞬态温度分布。In this paper,the 2-D transient coupled radiative and conductive heat transfer in a rectangular isotropiclly scattering semitransparent medium is studied by using the ray tracing-node analyzing method.The transient differential energy equation is discreted with the fully implicit finite difference method.The radiative source term of the energy equation is expressed by the radiative transfer coefficients（RTCs）,which are solved by the ray tracing method in combination with spectral band model.The Patankar linearization method is used to linerize the radiative source term and the opaque boundary conditions,and the opaque boundary conditions are dealed with additional source term method.The ADI method is applied to solve the nominal linearizing equations to obtain the transient temperature distribution in the 2-D rectangular medium.

关 键 词：射线踪迹-节点分析法 二维矩形半透明介质 各向同性散射 ADI方法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]