5&#215;5定位格架棒束通道内三维流场研究

5×5定位格架棒束通道内三维流场研究

基金项目:

空泡物理和自然循环国防科技重点实验室资助项目(51482040105CB0103)

1. College of Nuclear Science and Technology, Harbin Engineering University, 150001, China;
2. National Key Laboratory of Bubble Physics and Nature Circulation, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 采用混合网格技术、SSTk-ω湍流模型、改进的速度-压力耦合算法SIMPLEC求解雷诺时均的连续性方程、动量方程,得到格架内各截面的速度场和压力场。计算结果表明:在定位格架的影响下,通道内产生了强烈的横向流动;横向速度呈抛物线分布,轴向速度分布在通道内趋于均匀;阻力系数随进口雷诺数的增大而减小。将速度分布和阻力系数分布的预测值与试验值进行了对比,两者吻合较好。
- 定位格架 /
- 棒束通道 /
- 三维流场 /
- 湍流模型 /
- 数值方法
Abstract: This paper studied the 3-D single-phase flow field in 5×5 rod bundles with spacer grids by numerical method. By using hybrid grids technique, SST k-ω model and SIMPLEC algorithm, the Reynolds averaged mass conservation equation and momentum conservation equation were solved, and the pressure and velocity field were obtained. The results show that the spacer grid leads to intense lateral flow in rod bundles channel, and the lateral vilocity submits parabola distributing raw; axial velocities are distributed uniformly in the channel, and drag coefficient decreases as inlet Reynolds in the universe degrade. Calculation results agreed with experiment data well.
- Spacer grids /
- Rod Bundle Channel /
- 3-D Flow Field /
- Turbulence Model /
- Numerical Method