蒸汽发生器U型管低含气率两相倒流现象研究

储玺; 陈文振; 郝建立; 章德

doi:10.7538/yzk.2017.youxian.0701

蒸汽发生器U型管低含气率两相倒流现象研究

海军工程大学核科学技术学院,湖北武汉430033

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- 刊出日期: 2018-07-19

Investigation of Two-phase Reverse Flow in U-tube under Low Mass Quality Condition

College of Nuclear Science and Technology, Naval University of Engineering, Wuhan 430033, China

摘要

摘要: 针对立式倒U型管自然循环蒸汽发生器传热管内的两相倒流现象，基于均相流模型，建立了U型管内低含气率两相流动传热理论模型，给出了U型管的进出口压降-质量流量曲线，分析了U型管内出现两相倒流现象的机理，研究了二次侧流体温度和入口含气率对倒流现象的影响规律，并与单相倒流进行了对比。利用RELAP5/MOD 3.3程序对相同条件下的倒流问题进行了计算。研究表明，提高蒸汽发生器二次侧工作压力可减少倒流，两相流入口含气率越高，倒流越易发生，两相流较单相流在U型管内更易倒流。
- 两相流 ,
- 倒流 ,
- 蒸汽发生器 ,
- U型管
Abstract: The two-phase reverse flow phenomenon may occur in the inverted U-tubes of steam generator (SG) for natural circulation. A theoretical model of flow and heat transfer for two-phase flow in U-tubes based on the homogenous flow model was established in this paper. A pressure drop-mass flow curve was derived to investigate the mechanisms of two-phase reverse flow in U-tubes. The effects of inlet mass quality and fluid temperature in secondary side on the reverse flow were also analyzed. Then the theoretical results were verified by the RELAP5/MOD 3.3 codes. The research shows that increasing the SG secondary side pressure may reduce reverse flow phenomenon in U-tubes, and the phenomenon more likely occurs when the inlet mass quality increases.
- two-phase flow ,
- reverse flow ,
- steam generator ,
- U-tube

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参考文献(16)

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蒸汽发生器U型管低含气率两相倒流现象研究

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Investigation of Two-phase Reverse Flow in U-tube under Low Mass Quality Condition

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