Study on Effect of Temperature on the Narrow Gap Ressistance Coefficient Test

Meng Yang; Fan Ruichen; Sui Xi; Li Yong; Zheng Jiantao; Zhang Jiaqi; Wang Jie; Yu Ting

doi:10.13832/j.jnpe.2023.03.0074

Volume 44 Issue 3

Jun. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(3): 74-78

Meng Yang, Fan Ruichen, Sui Xi, Li Yong, Zheng Jiantao, Zhang Jiaqi, Wang Jie, Yu Ting. Study on Effect of Temperature on the Narrow Gap Ressistance Coefficient Test[J]. Nuclear Power Engineering, 2023, 44(3): 74-78. doi: 10.13832/j.jnpe.2023.03.0074

Citation:

Meng Yang, Fan Ruichen, Sui Xi, Li Yong, Zheng Jiantao, Zhang Jiaqi, Wang Jie, Yu Ting. Study on Effect of Temperature on the Narrow Gap Ressistance Coefficient Test[J]. Nuclear Power Engineering, 2023, 44(3): 74-78. doi: 10.13832/j.jnpe.2023.03.0074

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Study on Effect of Temperature on the Narrow Gap Ressistance Coefficient Test

doi: 10.13832/j.jnpe.2023.03.0074

Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2022-07-12
Rev Recd Date: 2022-08-22
Publish Date: 2023-06-15

Abstract

Abstract

The coolant leakage and bypass flow channel in PWR is mostly a narrow gap. The size of narrow gap is sensitive to be easily affected by system pressure, differential pressure, temperature, vibration and other factors. Small size changes will cause significant changes in resistance coefficient, resulting in the measured Reynolds number and resistance coefficient curve contrary to the basic principles of fluid dynamics. In this paper, the study on effect of temperature change on the flow resistance coefficient in narrow gap is conducted under the conditions of constant temperature and temperature rise. During the temperature rise test, the system pressure, the differential pressure and flow of the test body stays unchanged, and gradually increase the temperature of the fluid, then obtain the resistance coefficient of the test body under different temperature. The test results show that when the temperature of the test fluid rises from 23°C to 52°C, the narrow gap of the test body is more closely fitted due to thermal expansion and cold contraction, and the flow resistance coefficient increases by 8%.
- Leakage and bypass flow,
- Narrow gap,
- Resistance coefficient,
- Temperature rise test

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References(15)

References

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