CFD Simulation of Subcooled Boiling in a Full-Size 5&#215;5 Rod Bundle with Spacer Grids

LI Quan; Avramova M; LIu Yanghua; Zheng Meiyin; Zhao Yanli; Chen Jie; Jiao Yongjun; Yu Junchong

doi:10.13832/j.jnpe.2017.S2.0025

Volume 38 Issue S2

Feb. 2025

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LI Quan, Avramova M, LIu Yanghua, Zheng Meiyin, Zhao Yanli, Chen Jie, Jiao Yongjun, Yu Junchong. CFD Simulation of Subcooled Boiling in a Full-Size 5×5 Rod Bundle with Spacer Grids[J]. Nuclear Power Engineering, 2017, 38(S2): 25-28. doi: 10.13832/j.jnpe.2017.S2.0025

Citation:

LI Quan, Avramova M, LIu Yanghua, Zheng Meiyin, Zhao Yanli, Chen Jie, Jiao Yongjun, Yu Junchong. CFD Simulation of Subcooled Boiling in a Full-Size 5×5 Rod Bundle with Spacer Grids[J]. Nuclear Power Engineering, 2017, 38(S2): 25-28. doi: 10.13832/j.jnpe.2017.S2.0025

Citation:

LI Quan, Avramova M, LIu Yanghua, Zheng Meiyin, Zhao Yanli, Chen Jie, Jiao Yongjun, Yu Junchong. CFD Simulation of Subcooled Boiling in a Full-Size 5×5 Rod Bundle with Spacer Grids[J]. Nuclear Power Engineering, 2017, 38(S2): 25-28. doi: 10.13832/j.jnpe.2017.S2.0025

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CFD Simulation of Subcooled Boiling in a Full-Size 5×5 Rod Bundle with Spacer Grids

doi: 10.13832/j.jnpe.2017.S2.0025

1. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China;
2. Department of Nuclear Engineering, North Carolina State University, NC 27695, United States;
3. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China

Received Date: 2017-10-20
Rev Recd Date: 2017-11-05

Abstract

Abstract

In this paper, two-phase CFD approach is used to simulate the subcooled boiling flow in PSBT full-size rod bundle with spacer grids. The calculated surface averaged void fraction in the central four subchannels shows good agreement with the experimental data at high void fraction conditions, while higher than the measured data at low void fraction conditions. Through CFD analysis, the effect of the spacer grid on the void distribution can be obtained. The void fraction locates majorly around the central 9 hot rods upstream the mixing vane spacer grid, while more void locates in the central region of subchannels downstream the spacer grid. The numerical simulation of boiling two-phase flow can be used for the prediction of CHF and provides a new approach for the optimization of spacer grid.
- Full-size,
- Spacer gird,
- Subcooled boiling,
- Void fraction