Research on Onset of Pressure Drop Oscillation Flow Instability in A Two-Phase Natural Circulation System

Peng Chuanxin; Chen Bingde; Zhuo Wenbin; Xu Jianjun; Huang Yanping; Zan Yuanfeng; Liu Wenxing

doi:10.13832/j.jnpe.2017.02.0032

Volume 38 Issue 2

Feb. 2025

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Article Navigation > Nuclear Power Engineering > 2017 > 38(2): 32-37

Peng Chuanxin, Chen Bingde, Zhuo Wenbin, Xu Jianjun, Huang Yanping, Zan Yuanfeng, Liu Wenxing. Research on Onset of Pressure Drop Oscillation Flow Instability in A Two-Phase Natural Circulation System[J]. Nuclear Power Engineering, 2017, 38(2): 32-37. doi: 10.13832/j.jnpe.2017.02.0032

Citation:

Peng Chuanxin, Chen Bingde, Zhuo Wenbin, Xu Jianjun, Huang Yanping, Zan Yuanfeng, Liu Wenxing. Research on Onset of Pressure Drop Oscillation Flow Instability in A Two-Phase Natural Circulation System[J]. Nuclear Power Engineering, 2017, 38(2): 32-37. doi: 10.13832/j.jnpe.2017.02.0032

Citation:

Peng Chuanxin, Chen Bingde, Zhuo Wenbin, Xu Jianjun, Huang Yanping, Zan Yuanfeng, Liu Wenxing. Research on Onset of Pressure Drop Oscillation Flow Instability in A Two-Phase Natural Circulation System[J]. Nuclear Power Engineering, 2017, 38(2): 32-37. doi: 10.13832/j.jnpe.2017.02.0032

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Research on Onset of Pressure Drop Oscillation Flow Instability in A Two-Phase Natural Circulation System

doi: 10.13832/j.jnpe.2017.02.0032

CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2016-05-16
Rev Recd Date: 2016-12-20

Available Online: 2025-02-09

Abstract

Abstract

The onset of pressure drop oscillation in a two-phase natural circulation system was investigated in this paper.When the fully developed subcooling nucleate boiling happens in the test section,the fluctuating flow appears between the natural circulation loop and the pressurizer,which is caused by the generation of large amount of bubbles in the test section and the compressible space in the pressurizer.The fluctuating flow results in the occurrence of the pressure drop oscillation（PDO） in the natural circulation system.The power of the test section,when fully-developed sub-cooled nucleate boiling（FDB） occurred at the outlet,was calculated using both Bowring model and Saha-Zuber model.The calculated results are compared to the experimental power data at the onset of PDO.The error is less than 8 percent.Therefore the point of FDB can be considered to the onset of the PDO in the natural circulation system.
- Onset of pressure drop oscillation,
- Two-phase flow natural circulation,
- Fully developed nucleate boiling,
- Point of net vapor generation

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