Assessment of jet turbulence model of pressure vessels inset pipe based on direct numerical simulation

SUN Yumeng; LI Jie; WEI Zonglan; AI Zhelun; MIAO Heng; DENG Jian

doi:10.13471/j.cnki.acta.snus.ZR20240058

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Assessment of jet turbulence model of pressure vessels inset pipe based on direct numerical simulation

Research articles | 更新时间：2024-09-29

- Assessment of jet turbulence model of pressure vessels inset pipe based on direct numerical simulation
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 63, Issue 4, Pages: 88-96(2024)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.ZR20240058
  CLC： TL353
- Published：25 July 2024，
  
  Published Online：08 April 2024，
  
  Received：27 February 2024，
  
  Accepted：26 March 2024
- 稿件说明：
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孙宇蒙,李捷,魏宗岚等.基于直接数值模拟的压力容器入口射流湍流模型评价[J].中山大学学报(自然科学版)(中英文),2024,63(04):88-96.

SUN Yumeng,LI Jie,WEI Zonglan,et al.Assessment of jet turbulence model of pressure vessels inset pipe based on direct numerical simulation[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(04):88-96.
孙宇蒙,李捷,魏宗岚等.基于直接数值模拟的压力容器入口射流湍流模型评价[J].中山大学学报(自然科学版)(中英文),2024,63(04):88-96. DOI： 10.13471/j.cnki.acta.snus.ZR20240058.

SUN Yumeng,LI Jie,WEI Zonglan,et al.Assessment of jet turbulence model of pressure vessels inset pipe based on direct numerical simulation[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(04):88-96. DOI： 10.13471/j.cnki.acta.snus.ZR20240058.

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-

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

of 63 700， a downcomer section

of 14 014， and a flowing medium 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 findings indicate that the Stress-

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

Keywords

pressure vesseljetDNSturbulence modelwall functionassessment

references

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WEI Zonglan

DENG Jian

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Science and Technology on Reactor System Design Technology Laboratory， Nuclear Power Institute of China

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