离心级联供料扰动过程中丰度分布的数值模拟  

Numerical simulations of concentration distribution during feed disturbances in a centrifuge cascade

作　　者：李锦[1] 曾实[1] 

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《清华大学学报（自然科学版）》2009年第5期639-642,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(10875069)

摘　　要：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。研究结果可供实际同位素生产中参数分析和调整时参考。A dynamic mathematical model was developed to predict the concentration variations in a hydraulics simulation of an unsteady centrifuge cascade. The Q-iteration method was used to solve the concentration equations. Xe separation simulations show that the algorithm is effective for determining the unsteady concentration distributions in a centrifuge cascade. For the same level of disturbance, the concentration changes are related to the isotope mixture, the disturbance, the centrifuge holdup and the concentration distribution at the steady state. The simulations can be used for parameter analysis and to adjust industrial isotope production.

关 键 词：离心级联 同位素 动态过程 丰度分布 

分 类 号：TL252.01[核科学技术—核燃料循环与材料]