搅混格架结构对棒束通道内单相流场影响的数值研究

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基金项目:

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

Numerical Study on Single-Phase Flow Field in Rod Bundles with Spacer Grids

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

摘要: 采用数值方法对搅混格架(简称格架)内单相流体三维流场进行了研究。采用混合网格技术,标准k-ε湍流模型,改进的速度压力耦合算法SIMPLEC求解了雷诺时均的连续性方程、动量方程,得到了格架内各截面的速度场和压力场,分析了格架各部件对流场的影响。结果表明:弹簧和刚突的存在会形成横流和涡流,但形成的横向速度较小;在格架附近对轴向速度影响较大,对格架的阻力特性影响也较大;交混叶片对横向速度影响较大,对轴向速度有掺合平均的作用。
- 搅混格架 /
- 三维流场 /
- CFD /
- 数值模拟
Abstract: 3-D single-phase flow field in rod bundles with spacer grids was studied using numerical methodology.Using hybrid grids technique,employing standard k-ε model and SIMPLEC algorithm,the axial velocities obvious near the spacer grids than lateral velocities,it also influence the resistance characteristic obvious.Mixing vane affects lateral velocities much,and blends the axial velocity.
- Spacer Grids /
- 3-D flow field /
- CFD /
- Numerical simulation