为优化板型燃料组件池式反应堆设计 ,采用商用流体力学计算程序 CFX5对堆内流场进行了数值模拟。数值计算结果表明 :堆芯流量分配比较均匀 ,位于堆芯中央组件的流量较大 ,而位于堆芯边缘组件的流量较小。安装围桶的堆进出口差压与没有围桶的堆进出口差压很接近 ,随着堆入口流量增大 ,堆芯各组件流量与组件平均流量的最大误差和最小误差变化很小。安装围桶的堆芯流量分配情况与没有围桶的堆芯流量分配情况近似 ,安装围桶不能有效改善堆芯各组件的流量分配 In order to optimize the design of the plate reactor fuel cell stack reactor, CFX5, a commercial hydrodynamic calculation program, was used to simulate the flow field in the reactor. The numerical results show that the flow distribution in the core is more uniform, the flow rate in the central core of the reactor is larger, and the flow in the core edge component is smaller. The differential pressure between the inlet and outlet of the surrounding barrel and the inlet and outlet of the reactor without the surrounding barrel is very close. With the increase of the flow at the inlet of the reactor, the maximum error and the minimum error of the flow rate of the reactor core and the average flow rate of the component vary little. The distribution of the core flow of the shrouds is similar to the flow distribution of the core without the shrouds. The installation of the shrouds does not effectively improve the flow distribution of the components of the core