三角形排列的紧密栅元棒束内流动行为的数值模拟

基金项目:

空泡物理和自然循环重点实验室基金（9140C7103010706）和973项目（2007CB209804）

Numerical Simulation of Flow Behavior in Tight Lattice Rod Bundle

1. School of Nuclear Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China;
2. National Key Laboratory of Design Technology of Nuclear Reactor System, Nuclear Power Institute of China, Chengdu, 610041, China;
3. National Key Laboratory of Bubble Physics and Natural Circulation, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 对三角形排列紧密栅元通道内的空气湍流流动进行了数值研究,系统考察了涡粘性和雷诺应力两类湍流模型模拟紧密栅元通道内流动特征的适用性。结果表明:SSG雷诺应力模型对流动有较好的模拟,这说明湍流各项异性的模拟在紧密栅元中十分重要;不同雷诺数和几何结构下的模拟显示,二次流的大小和雷诺数的相关性不大,但随着棒间距和棒径比(P/D)的增大,二次流减小。
- 紧密栅元 /
- 数值模拟 /
- 三角形排列 /
- 湍流模型 /
- 二次流
Abstract: The Numerical investigation is performed on the air turbulent flow in triangular rod bundle array.Based on the experimental data,the eddy viscosity turbulent model and the Reynold stress turbulent model are evaluated to simulate the flow behavior in the tight lattice.The results show that SSG Reynolds Stress Model has shown superior predictive performance than other Reynolds-stress models,which indicates that the simulation of the anisotropy of the turbulence is significant in the tight lattice.The result with different Reynolds number and geometry shows that the magnitude of the secondary flow is almost independent of the Reynolds number,but it increases with the decrease of the P/D.
- Tight lattice /
- Numerical simulation /
- Triangular array /
- Turbulence model /
- Secondary flow