Heat Transfer and Temperature Fluctuation of Single-phase Natural Circulation Flow under Rolling Motion

摘要：

Effect of rolling upon heat transfer and temperature fluctuation characteristic of single-phase natural circulation is studied experimentally and theoretically. Experimental results show that rolling motion may cause the coolant fluctuation which results in the periodical oscillation of wall and fluid temperatures. The amplitude of wall temperature fluctuation is larger than that of fluid temperature oscillation. Because of the wall heat capacity, there is a phase difference between the fluctuation curves of fluid and wall temperatures. Also the results show that heat transfer of natural circulation under rolling is enhanced. Heat transfer coefficient increases with rolling amplitude and rolling frequency, the applicability of the present empirical correlation to calculate heat transfer coefficient under rolling motion is also discussed in this paper. Concluding the experimental data, a new natural circulation empirical correlation under rolling is achieved and a mathematical model is also conducted to simulate the temperature fluctuation under coolant flow fluctuation condition. The theoretical results agree very well with experimental data.

关键词： Heat transfer Temperature fluctuation Natural circulation Rolling motion

作者: Tan Si-chao Gao Pu-zhen

作者单位: College of Nuclear Science and Technology, Harbin Engineering University, Harbin 150001, China

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: 231-239

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）