CMFD加速在特征线法输运计算中的应用  

Application of Coarse-Mesh Finite Difference Acceleration in Transportation Calculation by Method of Characteristics

作　　者：汤春桃[1] 张少泓[1] 

机构地区：[1]上海交通大学核科学与工程学院,上海200240

出　　处：《核动力工程》2009年第5期8-12,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(10605016)

摘　　要：为解决特征线法求解复杂几何条件下中子输运问题收敛速度慢的问题,将粗网扩散计算中的粗网有限差分(CMFD:Coarse-Mesh Finite Difference)加速方法运用于中子输运计算中。采用粗网有限差分加速方法对C5G7MOX基准问题以及自定义的69群检验算例的计算表明,CMFD加速是一种十分高效的方法,可显著地提高特征线法求解中子输运问题的收敛速度,且问题规模越大,加速效果越明显。In order to address the low convergence issue of the method of characteristics, the coarse-mesh finite difference （CMFD） formulation, which is a widely recognized acceleration technique for coarse mesh diffusion calculation, is studied to speedup the MOC transport calculation. Numerical tests on C5G7 MOX benchmark problem and a 69 group test problem defined based on C5 demonstrate that CMFD acceleration is quite efficient in reducing the number of MOC iterations and the computing time. It also shows that the larger scale of the problem, the better effect of the CMFD acceleration.

关 键 词：粗网有限差分 加速方法 特征线法(MOC) 

分 类 号：TL329.2[核科学技术—核技术及应用]