Abstract: Based on the optimum numerical geometry of a sphere,a new angular quadrature scheme named Spherical surface Symmetrical equal Dividing(abbreviated to SSD _N ) was presented.The evaluations of double moment by SSD _N and other traditional quadrature sets showed that the new SSD _N could provide good accuracy and compared well with others such as the S _N with the highest accuracy.Radiative heat transfer predictions in a black-walled rectangular enclosure containing absorbing-emitting medium indicated that,compared with S _N ,T _N and SRAP _N ,the SSD _N could give almost as high or even accuracy as the S _N does under some order numbers N .The numerical experiments of iteration comparison higs lighted the feature of SSD _N of computational economy.

摘要： 基于优化计算几何原理 ,提出了球面微元对称等分 (sphericalsurfacesymmetricalequaldividing ,SSD_N)离散坐标方法 .经双动量矩检验计算及有精确解的辐射换热计算 ,与传统的、精度较高的几种方法相比 ,SSD_N 的精度较高 ,某些N取值的SSD_N 方法精度甚至高于S_N 方法 .关于计算迭代次数的比较表明 ,SSD_N 方法更能节省计算时间