Study on Transition Criteria of Slug Flow to Churn Flow in Vertical Rectangular Channel Based on Characteristics of Interfacial Force

He Qingche; Zhang Luteng; Pan Liangming; Xu Wangtao; Yan Meiyue; Sun Wan; Ma Zaiyong

doi:10.13832/j.jnpe.2023.06.0127

Volume 44 Issue 6

Dec. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(6): 127-133

He Qingche, Zhang Luteng, Pan Liangming, Xu Wangtao, Yan Meiyue, Sun Wan, Ma Zaiyong. Study on Transition Criteria of Slug Flow to Churn Flow in Vertical Rectangular Channel Based on Characteristics of Interfacial Force[J]. Nuclear Power Engineering, 2023, 44(6): 127-133. doi: 10.13832/j.jnpe.2023.06.0127

Citation:

He Qingche, Zhang Luteng, Pan Liangming, Xu Wangtao, Yan Meiyue, Sun Wan, Ma Zaiyong. Study on Transition Criteria of Slug Flow to Churn Flow in Vertical Rectangular Channel Based on Characteristics of Interfacial Force[J]. Nuclear Power Engineering, 2023, 44(6): 127-133. doi: 10.13832/j.jnpe.2023.06.0127

Citation:

He Qingche, Zhang Luteng, Pan Liangming, Xu Wangtao, Yan Meiyue, Sun Wan, Ma Zaiyong. Study on Transition Criteria of Slug Flow to Churn Flow in Vertical Rectangular Channel Based on Characteristics of Interfacial Force[J]. Nuclear Power Engineering, 2023, 44(6): 127-133. doi: 10.13832/j.jnpe.2023.06.0127

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Study on Transition Criteria of Slug Flow to Churn Flow in Vertical Rectangular Channel Based on Characteristics of Interfacial Force

doi: 10.13832/j.jnpe.2023.06.0127

He Qingche^{1, 2
,},
Zhang Luteng^{1, 2},
Pan Liangming^{1, 2
,
,},
Xu Wangtao^{1, 2},
Yan Meiyue^{1, 2},
Sun Wan^{1, 2},
Ma Zaiyong^{1, 2}

1.
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, 400044, China
2.
Department of Nuclear Engineering and Technology, Chongqing University, Chongqing, 400044, China

Received Date: 2023-02-06
Rev Recd Date: 2023-03-20

Available Online: 2023-12-11

Publish Date: 2023-12-15

Abstract

Abstract

The transitional criteria between different flow regimes is of great significance to the safety analysis of nuclear reactor operation, because determining the flow regime of two-phase flow is a prerequisite for calculating the interfacial force and heat transfer of two-phase flow. In this study, four types of rectangular channels with cross-sectional size of 4×66 mm, 6×66 mm, 8×66 mm and 10×100 mm were employed to conduct the research on air-water upward flow in rectangular channels, and the void fraction and pressure drop were measured by impedance void meter and differential pressure gauge respectively. The results show that, at the constant superficial liquid velocity, the amplitude of frictional pressure drop reaches the maximum value at the transitional point of slug flow to churn flow, and when the void fraction is 0.6, the transition from slug flow to churn flow begins. The experimental results also show that the interfacial force gradient increases rapidly with the void fraction after the flow regime transition point, and the interfacial force gradient can be used as the criterion for the transition from slug flow to churn flow in terms of mechanical characteristics..
- Two-phase flow,
- Rectangular channel,
- Flow regime,
- Void fraction,
- Interfacial force

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References(12)

References

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