原子能科学技术 ›› 2020, Vol. 54 ›› Issue (6): 1092-1098.DOI: 10.7538/yzk.2019.youxian.0842

• 反应堆工程 • 上一篇    下一篇

基于流固共轭传热的两相流动数值模拟及燃料子通道CHF预测研究

冯琳娜;李权;黄永忠;刘振海;齐飞鹏;M. Avramova   

  1. 中国核动力研究设计院 核反应堆系统设计技术重点实验室,四川 成都610213;北卡罗来纳州立大学,美国 罗利27695
  • 出版日期:2020-06-20 发布日期:2020-06-20

Subcooled Boiling Simulation and Prediction of Critical Heat Flux in Fuel Subchannel Based on Conjugate Heat Transfer

FENG Linna;LI Quan;HUANG Yongzhong;LIU Zhenhai;QI Feipeng;M. Avramova   

  1. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, China;North Carolina State University, Raleigh, NC 27695, United States
  • Online:2020-06-20 Published:2020-06-20

摘要:

为对过冷沸腾两相流动进行准确模拟,并探索临界热流密度(CHF)预测方法,本文基于共轭传热和两相CFD分析的方法,通过流固界面耦合,建立流固共轭传热两相流动耦合求解的数值模型。首先通过典型燃料棒栅元过冷沸腾两相流动的模拟,验证数值模型的正确性。随后对燃料子通道内两相流动进行模拟,并在两相流动模拟的基础上,通过准瞬态的方法,建立与CHF试验过程非常近似的CHF预测方法,将加热壁面的温度飞升作为CHF判定的标准,实现对燃料组件子通道CHF的数值预测。研究表明,本文建立的数值模拟方法,可为燃料组件或其他换热系统的CHF预测奠定基础,为燃料组件的设计提供新的辅助手段。

关键词: 共轭传热, 过冷沸腾, 两相流动, 临界热流密度, 壁面温度

Abstract:

On purpose of accurately simulating the subcooled boiling and then predicting the critical heat flux (CHF), subcooled boiling coupled with conjugate heat transfer was modeled based on two-phase CFD approach and interfacial transfer. This numerical approach was proved by typical fuel pin simulations firstly. On the basis of boiling two-phase flow in a fuel subchannel, a CHF prediction method, whose process is similar to CHF experiment, was developed using the wall temperature rise as a criterion. Through this method, the CHF in a fuel subchannel was simulated. The results show that the CHF prediction method developed in this paper can be used for CHF prediction in fuel assembly or other heat transfer systems and provides a new tool for the design and optimization of fuel assembly.

Key words: conjugate heat transfer, subcooled boiling, two-phase flow, critical heat flux, wall temperature