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讨论粗网离散节块法在二维柱坐标系内中子输运方程数值求解中的应用.给出方法的数学模型,在节块内中子通量采用二次近似,表面泄漏采用常数近似.根据所提出的理论模型,编制了考虑各向异性散射的二维节块输运程序DNSN/2D,并对一系列检验和基准问题作了计算.计算结果表明,与传统S_N方法相比,它具有很高的计算效率,在很粗的节块分割下具有非常高的精度.
The application of the method of coarse-grid discrete nodules to the numerical solution of the neutron transport equation in a two-dimensional cylindrical coordinate system is discussed. The mathematical model of the method is given. In the nodules, the neutron flux is quadratic approximated and the surface leakage is approximated by a constant According to the proposed theoretical model, a two-dimensional nodal transport program DNSN / 2D considering anisotropic scattering is developed and a series of test and benchmark problems are calculated.The results show that compared with the traditional S_N method, It has a high computational efficiency, with a very high degree of accuracy under very coarse sectioning.