Numerical Study of Two-phase Flow Instability in Natural Circulation System

摘要：

Based on the one-dimension two-phase drift flow model, the numerical simulation of two-phase flow stability characteristic on the test loop (HRTL-5) for 5 MW heating reactor (developed by the Institute of Nuclear and New Energy Technology of Tsinghua University, Beijing) is performed with and without coupled point neutron kinetics. The density wave oscillation instability is analyzed in the system with lower pressure at 1.5 MPa and lower quality below 10 percents. The effect of different inlet subcooling and different heating flux on the system instabilities is simulated with the system pressure Psys=1.5 MPa. The numerical results show that there exist two instability inlet subcooling boundaries at different heat flux. The numerical results show good agreement with the experimental results on HRTL-5 without consideration on point neutron kinetics. If coupled with point neutron kinetics, the system will exhibit little difference on instabihty boundaries from without considering the nuclear characteristics. But the amplitude and the phase of the oscillation of the thermal hydraulic parameters of the system will be somehow affected in instability zone if the system is coupled with point neutron kinetics.

关键词： Numerical study Two-phase flow Natural circulation

作者: Wang Jianjun Gao Yang Jiang Shenyao Yang Xingtuan

作者单位: College of Nuclear Science and Technology, Harbin Engineering University, Harbin 150001, China The Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Institute of

会议类型: 国际会议

会议名称: ISSNP2008、CSEPC、ISOFIC2008(第二届21世纪和谐核电系统国际会议、第四届电厂控制中认知系统工程方法国际会议暨第三届未来核电厂仪表与控制国际会议)

会议地点: 哈尔滨

会议语种:英文

页码: 202-207

在线出版日期: 2008-09-08（万方平台首次上网日期，不代表论文的发表时间）