强各向异性散射中子输运方程加速方法  

Acceleration Method for Neutron Transport Equation with Highly Anisotropic Scattering

作　　者：孙幸光[1] 吴宏春[1] 沈智军[2] 

机构地区：[1]西安交通大学,西安710049 [2]北京应用物理与计算数学研究所,北京100088

出　　处：《核动力工程》2008年第1期125-128,共4页Nuclear Power Engineering

基　　金：北京应用物理和计算数学研究所基金项目(51479050105JW0804)

摘　　要：采用修正的PN方程加速中子输运方程的SN数值求解过程。并将该加速方法应用到国际通用的ANISN程序中,对其进行了数值检验。数值计算结果表明,本文加速方法可以使迭代次数大量减少,特别是对于强各向异性散射问题具有明显的加速效果。SN method is wildly used to solve neutron transport equation, but SN method is very slow with highly anisotropic scattering. In this paper, the modified PN synthetic acceleration （MPSA） method is used to accelerate SN method, and applied to the code of ANISN which is internationally used. MPSA method not only can accelerate the computation with low-order of angular flux moments, but also with high-order of angular flux moments. So MPSA method is more efficient than DSA method. Numerical results for the test problems demonstrate that MPSA method is quiet efficient and robust, especially for the problems with highly anisotropic scattering.

关 键 词：中子输运 加速方法 强各向异性散射 

分 类 号：TL329.2[核科学技术—核技术及应用]