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为了得到离心级联流体状态变化时同位素丰度分布情况,建立了丰度变化下的动态数学模型,与水力学数值模拟进行耦合,利用Q迭代算法求解了动态丰度方程。Xe分离数值模拟结果表明,该模型和算法可以有效求解离心级联动态丰度分布。在扰动幅度和持续时间都相同的情况下,丰度的变化与该组分在同位素中的位置、距离扰动级的位置、机器滞留量以及稳态下丰度的分布情况都密切相关。研究结果对于实际同位素生产中参数分析和调整具有参考价值。
In order to get the distribution of isotope abundance when the state of fluid in the centrifugal cascade changes, a dynamic mathematical model with changes in abundance was established and coupled with the numerical simulation of hydraulics. The dynamic abundance equation was solved by Q iterative algorithm. Xe separation numerical simulation results show that the model and algorithm can effectively solve the dynamic abundance distribution of the cascade. Under the same disturbance amplitude and duration, the changes of abundance are closely related to the position of the component in isotope, the position of the disturbance stage, the retention of machinery and the distribution of abundance at steady state. The research results have reference value for parameter analysis and adjustment in actual isotope production.