余弦粗糙面辐射特性数值模拟研究  

Numerical Simulation of Radiative Property of Cosine Rough Surface

作　　者：程强[1] 王志超[1] 黄志锋[1] 周怀春[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《工程热物理学报》2011年第12期2096-2099,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50906027;No.51025622;No.51021065)

摘　　要：提出一种基于几何光学法的精确计算粗糙表面的辐射特性的研究方法,研究了半球漫入射一维余弦粗糙面情况下,离散网格数目和方向离散数目对计算精度的影响,分析了粗糙面的粗糙度和相对尺度,及一次、多次散射分别对出射方向辐射强度的影响,解释了不同粗糙面中的散射增强现象。A precise method based on geometric optics method was developed to study radiative prop- erty of rough surface. Effect of numbers of discrete grids and directions on the computation accuracy was investigated with diffuse incidence into one dimensional cosine rough surface among a hemispheric solid angle. And the influence of roughness and correlation length, one- and multi-scattering of rough surface on the outgoing angular radiative intensity was also discussed; the scattering enhancement of energy within different rough surfaces was explained.

关 键 词：粗糙面 几何光学法 辐射特性 辐射强度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]