球床堆内冷却剂流动与传热特性的CFD研究

CFD Research on Flow and Heat Transfer Characteristics of Coolant in Pebble Bed Reactor Core

以计算流体力学(CFD)为基础,利用大型商业软件ProE和CFX,对球床式水冷堆堆芯燃料元件进行三维建模、网格划分和数值计算,对堆芯内冷却剂热工水力特性进行了初步的研究。计算比较了燃料元件球间隙和接触情况下冷却剂的速度场、温度场和压力分布,分析了其对堆芯安全的影响。

The 3-D physical and geometrical model of the water cooled pebble bed reactor were built using the commercial software ProE and CFX,in which the of the coolant were studied based on the computational fluid dynamics (CFD).The velocity field,temperature field and pressure distribution of the coolant are obtained and analyzed in the cases of inter-pebble gap and direct contact,and its effects on the core safety are also analyzed.