Numerical simulation of mixing turbulent flow in rod bundle with spacer grids

被引：0

作者：

Wei, Zonglan ^{[1
]}

Zhang, Yu ^{[1
]}

Liu, Songtao ^{[1
]}

Ma, Qiang ^{[2
]}

机构：

[1] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu

[2] CNOOC Research Center, Beijing

来源：

Hedongli Gongcheng/Nuclear Power Engineering | 2015年 / 36卷 / 04期

关键词：

CFD; Large eddy simulation; Rod bundle; Spacer grid; Turbulent flow;

D O I：

10.13832/j.jnpe.2015.04.0158

中图分类号：

学科分类号：

摘要：

The purpose of the present paper is to evaluate the validity of CFD, especially Large Eddy Simulation (LES), to simulate the OECD/NEA benchmark experiment MATiS-H. The 5×5 rod bundle with a split-type spacer grid is simulated by both steady and transient simulation and the numerical results of time averaged and root-mean-square velocity field are compared to the experimental data. It is demonstrated that LES can better describe the mixing turbulent flow velocity field than the RANS method. The mesh sensitivity analysis further reveals that LES with fine mesh is more appropriate for analyzing the turbulent flow field in the rod bundle with spacer grids. LES results help understand the mixing turbulence characteristics with the mixing effect evaluation in transient. The simulated flow field data can also be of value for mechanical evaluations such as flow-induced vibration and grid-to-rod-fretting phenomenon. ©, 2015, Editorial Office of Nuclear Power Engineering. All right reserved.

引用

页码：158 / 162

页数：4

共 4 条

[1] Jin Y., Kun Y., Tatli E., Et al., A new method to predict Grid-To-Rod Fretting in a PWR fuel assembly inlet region, Nuclear Engineering and Design, 241, pp. 2974-2982, (2011)
[2] Liu C.C., Fernga Y.M., Shih C.K., CFD evaluation of turbulence models for flow simulation of the fuel rod bundle with a spacer assembly, Applied Thermal Engineering, 40, pp. 389-396, (2012)
[3] Bakosi J., Christon M.A., Large eddy simulations of turbulent flow for grid-to-rod fretting in nuclear reactors, Nuclear Engineering and Design, 262, pp. 544-561, (2013)
[4] Smith B.L., Song C.H., Chang S.K., Report of the OECD/NEA KAERI rod bundle CFD benchmark exercise, (2013)

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