Numerical Computation of Eigenvalue for Steady Neutron Transport Equation
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摘要: 散射源项各向异性展开阶数较大或者离散纵标方法的角度离散方向较多时,中子输运方程本征值的计算迭代容易失败。为了克服该问题,本文通过数学上的推导,构造了中子输运方程α本征值迭代求解的一种新方法,数值算例表明该方法提高了收敛速度,不收敛的问题也得到明显改善。对keff本征值的计算进行改进,改进后的方法不依赖迭代初值,数值算例表明改进方法的计算结果较好。Abstract: The iteration progress will not succeed in the computation of eigenvalue for the neutron transport equations,when considering more expanding number for anisotropic scattering source or more discrete direction for discrete ordinate method.In this paper,the numerical computation of eigenvalue is studied for spherical steady neutron transport equation and a new method is constructed.The new method can improve the convergence rate and nonconvergent case.The modification of computation for keff eigenvalue will not dependent on the iterative initial value and the numerical results are stable.
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Key words:
- α eigenvalue /
- keff eigenvalue /
- Discrete ordinate /
- Anisotropic scattering source
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