摘要
采用数值方法对5×5定位格架棒束通道内三维流场进行了研究,以了解定位格架各典型部件对流场的不同影响。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及并行算法技术求解雷诺时均的连续性方程、动量方程,得到通道内各截面的速度场和压力场,并分析了格架各典型部件对流场的影响。结果表明:搅混叶片是产生横向速度的主要原因;弹簧和刚突对轴向速度和阻力系数有较大影响,其中,弹簧的影响更大;搅混叶片对轴向速度有掺合平均的作用。
In order to find out different effects for different parts of spacer grids, 3-D single-phase flow field in 5 × 5 rod bundles with spacer grids by numerical method was studied. By using hybrid grids technique, SST κ-ω model and SIMPLEC algorithm, the Reynolds averaged mass conservation equation and momentum conservation equations were solved, and the pressure and velocity fields were obtained. The results show that the mixing vane is the main factor of lateral velocity, spring and dimple influent the axial velocity, drag coefficient largely, and the effect of spring is larger. The mixing vane has the effect of blending and averaging the axial velocity.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2009年第1期41-45,共5页
Atomic Energy Science and Technology
基金
空泡物理和自然循环国防科技重点实验室资助项目(51482040105CB0103)
关键词
定位格架
三维流场
湍流模型
数值模拟
并行算法
spacer grids
3-D flow field
turbulence model
numerical simulation
parallel algorithm
