Simulation of vertical upward sub-cooled boiling flow in a pipe

王小军

您当前的位置：

首页 >

文章列表页 >

Simulation of vertical upward sub-cooled boiling flow in a pipe

更新时间：2025-12-10

- Simulation of vertical upward sub-cooled boiling flow in a pipe
- CIESC Journal Issue 6, (2007)
- 作者机构：
  
  中国核动力研究设计院空泡物理和自然循环国家级重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 June 2007，
  
  Published：05 June 2007
- 稿件说明：
移动端阅览
王小军. Simulation of vertical upward sub-cooled boiling flow in a pipe[J]. CIESC Journal, 2007, (6).
DOI：

王小军. Simulation of vertical upward sub-cooled boiling flow in a pipe[J]. CIESC Journal, 2007, (6). DOI：

摘要

采用计算流体动力学（CFD）程序CFX4.4对加热上升管内过冷流动沸腾工况下气水两相流动局部两相流参数（空泡份额和汽泡尺寸）进行了数值模拟。对数值差分方法、相关模型（界面力和气泡诱导的紊流）和汽泡尺寸进行了敏感性分析。空泡份额分布计算结果与实验结果比较表明，在低空泡份额工况下，两者符合较好，在高空泡份额工况下两者存在一定偏差，并且气相速度和汽泡尺寸的计算结果不理想。计算结果与实验结果之间的差异说明程序模型对于加热上升管内过冷流动沸腾模拟并不完善，建立更为合理的汽泡尺寸模型，考虑汽泡的合并和撕裂是必要的。

Abstract

Multidimensional modeling of vertical upward subcooled boiling flow was performed and the local two-phase flow parameters (void fraction and bubble size) were calculated by using the computational fluid dynamics code—CFX4.4

in which lateral interfacial effects based on a three-dimensional two-fluid model were accounted for.A sensitivity analysis of the difference method

interfacial force and bubble-induced turbulence and bubble size was made.The method of using the CFD code for prediction of sub-cooled boiling flow in a pipe was established.The predicted lateral distributions of void fraction showed excellent agreement with the measurements at low void fraction

but somewhat larger difference at higher void fraction in vertical upward sub-cooled boiling flow.The predicted lateral distributions of vapor velocity and bubble diameter were not satisfactory.The results showed that a reasonable bubble diameter model and modeling of bubble coalescence and tearing would be necessary for improving calculation accuracy.

关键词

Keywords

references

Views

499

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Corrosion health status assessment method for refining unit pipeline based on GLAE-MLP

Heat transfer mechanisms, bottleneck identification and optimization in heat exchanger networks under variable operating conditions

Study on performance enhancement and cold retention characteristics of solid packed bed cold energy storage

Performance analysis and application of thermal and humidity control system cascade driven by waste heat

Experimental study of heat transfer enhancement by pressure waves in cross flow tube bundles

Related Author

No data

Related Institution

No data

⁰