基于CFD方法的自然循环反应堆冷却剂流动特性分析

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Analysis of Flow Behavior of Coolant in Natural Circulation Reactor Based on Computational Fluid Dynamics

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 运用计算流体力学(CFD)方法对自然循环反应堆冷却剂流场进行计算模拟。分析发现,采用剪切应力传输模型(SST)与雷诺应力模型(SSG)进行流场计算,其结果基本一致;CFD流量计算结果与系统程序Relap5流量计算结果基本一致。对反应堆堆芯采用闭式通道和设置提升筒的方案进行论证分析发现,两种方案均对流量分配产生影响,使流量分配特性与堆芯径向功率分布更加接近,从而实现流量分区。
- 自然循环 /
- 计算流体力学(CFD) /
- 流场 /
- 流量分配
Abstract: Flow behavior of coolant in natural circulation reactor was analyzed by CFD.The analysis found that the results of flow field calculated by SST and SSG turbulence models are basically same,and the results of flowrate calculated by CFD and Relap5 are also basically same.From CFD calculations,the flow distributions were symmetrical at the lower plate,which showed that the minimal mass flow factor was 0.93.Flow distributions could be adjusted by closed core channels and chimneys,which gave the better results.
- Natural circulation /
- Computational Fluid Dynamics（CFD） /
- Flow field /
- Flow distribution