快堆钠池三维稳态与非稳态流动传热的数值研究

采用ＦＡＳＴＯＲ－３Ｄ程序对快堆钠池进行计算。该程序基于ＳＩＭＰＬＥＣ算法和交错网格的三维流动传热模拟程序，程序中应用多孔介质模型模拟流场中障碍物的影响。在稳态计算的基础上，对温度小波动、停堆和停泵３种非稳态工况进行了模拟计算，并对得到的流场和温度场数据进行了分析。结果表明：ＦＡＳＴＯＲ－３Ｄ程序具有良好的稳定性，所采用的多孔介质模型的合理性由计算结果与钠池的几何结构相符得以证实。停堆和停泵事故工况下的计算结果符合低流速的基本特征。

NUMERICAL ANALYSIS OF HEAT TRANSFER AND FLOW WITH THREE DIMENSIONAL STEADY AND TRANSIENT STATES IN SODIUM POOL OF FAST BREEDER REACTOR

Three dimensional computer code FASTOR 3D, based on SIMPLEC algorithm and staggered grid scheme, is used to simulate heat transfer and flows in sodium pool of fast breeder reactor. Porosity model is used to simulate the effects of obstacles in the fluid domain. On the basis of computation and analysis for flow line and temperature disributions of steady state three kinds of transient situations, temperature fluctuating, pump stopping and shut down are computed. The data of flowline and temperature are analyzed. It is found that FASTOR 3D has good stability and the porosity model is reasonable by accordance between numerical results and geometrical conditions. Numerical results of two accident situations, pump stopping and shut down, conform to the basic features of low velocity.