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Application of MRV in experimental investigation of flow field characteristics in a coolant channel within a fuel assembly
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Zirui WANG1, 2, 3, Ke ZHANG1, 2, 3, *, Jingtian DUAN1, 2, 3, Junmei WU1, 2, 3, Zhike LAN4
Journal of Experiments in Fluid Mechanics | 2026, 40(1) : 88 - 98
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Journal of Experiments in Fluid Mechanics | 2026, 40(1): 88-98
• Measuring Technique •
Application of MRV in experimental investigation of flow field characteristics in a coolant channel within a fuel assembly
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Zirui WANG1, 2, 3, Ke ZHANG1, 2, 3, *, Jingtian DUAN1, 2, 3, Junmei WU1, 2, 3, Zhike LAN4
Affiliations
  • 1School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an　710049, China
  • 2State Key Laboratory for Strength and Mechanical Structures, Xi’an Jiaotong University, Xi’an　710049, China
  • 3Shaanxi Key Laboratory of Environment and Control for Flight Vehicle, Xi’an Jiaotong University, Xi’an　710049, China
  • 4Nuclear Power Institute of China, Chengdu　610213, China
Published: 2026-02-25 doi: 10.11729/syltlx20230167
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Magnetic Resonance Velocimetry (MRV) is becoming a crucial experimental technology for flow field visualization, flow heat transfer mechanism investigating, and numerical model validation. In recent years, the MRV technology has been employed in experimental investigations of coolant channel flow fields in nuclear reactor core fuel assemblies, providing fundamental data for core thermal hydraulic characteristics research and safety analysis. A literature overview of the research progress using MRV technology in experimental studies on the flow field of reactor core fuel assembly channels is presented in this paper. The three-dimensional coolant flow field within a 2 × 2 simplified rod bundle channel was measured using MRV, and quantitative comparisons were conducted with PIV measurement results from previous literature to investigate the key parameters influencing the measurement accuracy of MRV. In this study, MRV tests were performed under two conditions of Re = 12500 and 25000, respectively. The results indicate that the axial velocity from MRV within the investigated channel has a maximum discrepancy of 5.05% compared to the PIV data reported in the literature.

Magnetic Resonance Velocimetry (MRV)  /  experimental technology  /  rod bundle  /  full field flow measurement
王子瑞, 张科, 段敬添, 武俊梅, 兰治科. 核磁共振测速技术在燃料组件冷却剂通道流场实验研究的应用. 实验流体力学, 2026 , 40 (1) : 88 -98 . DOI: 10.11729/syltlx20230167
Zirui WANG, Ke ZHANG, Jingtian DUAN, Junmei WU, Zhike LAN. Application of MRV in experimental investigation of flow field characteristics in a coolant channel within a fuel assembly[J]. Journal of Experiments in Fluid Mechanics, 2026 , 40 (1) : 88 -98 . DOI: 10.11729/syltlx20230167
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Year 2026 volume 40 Issue 1
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Article Info
doi: 10.11729/syltlx20230167
  • Receive Date：2023-12-28
  • Online Date：2026-10-22
  • Published：2026-02-25
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History
  • Received：2023-12-28
  • Revised：2024-03-25
  • Accepted：2024-04-03
Affiliations
    1School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an　710049, China
    2State Key Laboratory for Strength and Mechanical Structures, Xi’an Jiaotong University, Xi’an　710049, China
    3Shaanxi Key Laboratory of Environment and Control for Flight Vehicle, Xi’an Jiaotong University, Xi’an　710049, China
    4Nuclear Power Institute of China, Chengdu　610213, China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
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光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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