原子能科学技术Issue(1)：67-73,7.DOI:10.7538/yzk.2014.48.01.0067
CFX 中湍流模型用于分析超临界水传热的适用性评价
Performance Assessment of Turbulence Models in CFX for Predicting Heat Transfer of Supercritical Water
李捷 1江光明 2俞冀阳 1于俊崇1
作者信息
- 1. 清华大学工程物理系，北京 100084
- 2. 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 610041
- 折叠
摘要
Abstract
Based on two sets of experimental data ,the performance of predicting heat transfer of supercritical water in a vertical tube using CFX code with 12 turbulence models was assessed .The result of BSL explicit algebraic Reynolds stress model agrees the most closely with the experimental data under forced convection ,but the differences among various turbulence models are small . However , under mixed convection condition ,εtype turbulence models with wall function can not predict heat transfer deterioration phenomenon , while ω type turbulence models with automatic wall treatment can ,but the predicted wall temperatures deviate largely from experimental results .The assessment results show that near wall treatment methods have great influence on the simulation results . The following two factors also lead to the unreasonably predicted heat transfer behavior : Modeling turbulent heat flux with turbulent Prandtl number and neglecting density fluctuation . It is recommended that turbulence models should be improved .关键词
CFX/超临界水/传热/湍流模型/浮力Key words
CFX/supercritical water/heat transfer/turbulence model/buoyancy分类
能源科技引用本文复制引用
李捷,江光明,俞冀阳,于俊崇..CFX 中湍流模型用于分析超临界水传热的适用性评价[J].原子能科学技术,2014,(1):67-73,7.
