基于直接数值模拟的压力容器入口射流湍流模型评价
Assessment of jet turbulence model of pressure vessels inset pipe based on direct numerical simulation
孙宇蒙 1李捷 1魏宗岚 2艾哲伦 1苗恒 1邓坚2
作者信息
- 1. 中山大学中法核工程与核技术学院,广东 珠海 519082
- 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 610012
- 折叠
摘要
采用基于谱元法的开源软件Nek5000对压力容器入口射流进行直接数值模拟(DNS).压力容器模拟在环向简化为1/3的尺度,主管段雷诺数为63 700,下降段雷诺数为14 014,工质为碘化钠溶液.通过对常见物理量进行统计,构建高精度湍流数据库.并采用FLUENT对常见的壁面函数和湍流模型进行适应性评价,评价标准包括速度、湍动能和湍流黏度.结果表明:在上升段Stress-ω模型适用性最好;在下降段,Standard k-ω模型适用性最优.
Abstract
The open-source software Nek5000,based on the spectral element method,was used to conduct direct numerical simulation(DNS)of the pressure vessel inset pipe.A simplified 1/3 scale pressure vessel with a main pipe Re of 63 700,a downcomer section Re of 14 014,and a flowing me-dium of sodium iodide solution were used for the simulations.Turbulent statistics were conducted on common physical quantities,leading to the construction of a highly accurate turbulent flow database.Fluent was used to conduct an adaptive assessment of common wall functions and turbulent models,with assessment criteria based on velocity,turbulent kinetic energy,and turbulent viscosity.The find-ings indicate that the Stress-ω model is optimal for the rising section,whereas the Standard k-ω model is preferable for the downcomer section.
关键词
压力容器/射流/直接数值模拟/湍流模型/壁面函数/评价Key words
pressure vessel/jet/DNS/turbulence model/wall function/assessment引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据