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

作　　者：孙宇蒙 李捷[1] 魏宗岚 艾哲伦 苗恒 邓坚[2] SUN Yumeng;LI Jie;WEI Zonglan;AI Zhelun;MIAO Heng;DENG Jian(Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,China;Nuclear Power Institute of China/Science and Technology on Reactor System Design Technology Laboratory,Chengdu 610012,China)

机构地区：[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

出　　处：《中山大学学报（自然科学版）（中英文）》2024年第4期88-96,共9页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(12075111)。

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63700,下降段雷诺数为14014,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。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 63700,a downcomer section Re of 14014,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-ωmodel is optimal for the rising section,whereas the Standard k-ωmodel 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 

分 类 号：TL353[核科学技术—核技术及应用]