摘要
以具有不同当量直径的矩形、圆形、三角形、环形等管道为研究对象,利用ANSYS CFX分别计算在定质量流量和定流体速度条件下,超临界水在不同通道内的流动换热特性。发现在定质量流量条件下,圆形通道换热特性最优,且小当量直径促进流体换热;在定入口流速条件下,环形通道换热特性最优,小当量直径管道促进亚临界流体换热,大当量直径管道促进超临界流体换热。
Background： Supercritical water reactor （SCWR） is the only one that uses light water as a coolant among all fourth generation nuclear reactors. Purpose： This study aims to investigate the characteristics of supercritical water heat transfer in various pipelines. Methods： The models of rectangular, triangular, circle and annular channels are employed, with equivalent diameters of 2 ram, 3 mm and 5 mm for each of them. Based on these models, heat transfer charactersistics of supercritical water in different shape channels at certain mass flow and fluid velocity were calculated via ANSYS CFX. Results： There are two situations for the same equivalent diameter： in the condition of constant mass flow rate, the heat transfer property of circle channel outperforms other three types of channels, and the smaller equivalent diameter channels, the better of the heat transfer. In constant fluid velocity condition, the heat transfer property of annular channel presents best performance over others, and the smaller equivalent diameter channels, the better of the heat transfer in subcritical condition whilst the bigger equivalent diameter channels, the better of the heat transfer in supercritical condition. Conclusion： Compared with the experimental results, the model can provide a certain reference for the design of supercritical water reactor.
出处
《核技术》
CAS
CSCD
北大核心
2015年第10期88-94,共7页
Nuclear Techniques
基金
中核核反应堆热工水力技术重点实验室基金(No.20130901)
中国核动力院反应堆系统设计国家重点实验室基金(No.2013-49)资助
关键词
不同通道
超临界水
换热特性
Different shape channels, Supercritical water, Heat transfer characteristics
