Research on Disturbance Wave Characteristics of Annular Flow on Edge and Corner Rods of Rod Bundle Channel

Jin Guangyuan; Bai Jinghu; Wang Rui; Li Weilian; Du Lipeng; Zhang Wenchao

doi:10.13832/j.jnpe.2025.01.0143

Volume 46 Issue 1

Feb. 2025

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Article Navigation > Nuclear Power Engineering > 2025 > 46(1): 143-151

Jin Guangyuan, Bai Jinghu, Wang Rui, Li Weilian, Du Lipeng, Zhang Wenchao. Research on Disturbance Wave Characteristics of Annular Flow on Edge and Corner Rods of Rod Bundle Channel[J]. Nuclear Power Engineering, 2025, 46(1): 143-151. doi: 10.13832/j.jnpe.2025.01.0143

Citation:

Jin Guangyuan, Bai Jinghu, Wang Rui, Li Weilian, Du Lipeng, Zhang Wenchao. Research on Disturbance Wave Characteristics of Annular Flow on Edge and Corner Rods of Rod Bundle Channel[J]. Nuclear Power Engineering, 2025, 46(1): 143-151. doi: 10.13832/j.jnpe.2025.01.0143

Citation:

Jin Guangyuan, Bai Jinghu, Wang Rui, Li Weilian, Du Lipeng, Zhang Wenchao. Research on Disturbance Wave Characteristics of Annular Flow on Edge and Corner Rods of Rod Bundle Channel[J]. Nuclear Power Engineering, 2025, 46(1): 143-151. doi: 10.13832/j.jnpe.2025.01.0143

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Research on Disturbance Wave Characteristics of Annular Flow on Edge and Corner Rods of Rod Bundle Channel

doi: 10.13832/j.jnpe.2025.01.0143

Jin Guangyuan^{1, 2
,},
Bai Jinghu^{1, 2},
Wang Rui^{1, 2},
Li Weilian^{1, 2},
Du Lipeng^{1, 2},
Zhang Wenchao^{1, 2}

1.
School of Energy and Power Engineering, Northeast Electric Power University, Jilin, Jilin, 132012, China
2.
Laboratory of Thermo-Fluid Science and Nuclear Engineering, Northeast Electric Power University, Jilin, Jilin, 132012, China

Received Date: 2024-04-01
Rev Recd Date: 2024-05-18
Publish Date: 2025-02-15

Abstract

Abstract

The research on disturbance wave characteristics of annular flow on edge and corner rods of rod bundle channel can provide theoretical supports for the steady-state operation and emergency disposal of nuclear power plants. In this study, a visualize experimental system for annular flow in rod bundle channel was set up to analyze the disturbance wave characteristics on edge and corner rod surface. The results show that the disturbance wave behaviors can be divided into the small-scale waves, the bag-shaped waves, the ligament-shaped waves and the ligament-shaped waves with liquid-loss. When the liquid superficial velocity remains constant, the average film thickness decreases with the increase of gas superficial velocity; when the liquid superficial velocity is increasing, the average film thickness is also increasing. The disturbance wave height decreases with the increasing gas superficial velocity, and the disturbance wave height on side rod is lower than that of corner rod. When the liquid superficial velocity is lower than 0.41 m/s, the wave velocity increases with the increasing gas and liquid velocity. The wave velocity is higher than the gas superficial velocity when the liquid velocity is higher than 0.41 m/s. The wave frequency becomes larger with the increasing gas superficial velocity, but the law of change with liquid superficial velocity is not obvious, which depends on the change of wave form. The average entropy value of liquid film thickness of side and corner rods increases with the wave behaviors from small-scale waves, bag-shaped waves, ligament-shaped waves to ligament-shaped waves with liquid-loss, so the wave form in rod bundle channel can be determined by the multiscale permutation entropy analysis method.
- Rod bundle channel,
- Annular flow,
- Disturbance wave,
- Multiscale permutation entropy

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References(24)

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