折流板液滴分离的OpenFOAM模拟及验证

张申; 桂南; 杨星团; 屠基元; 姜胜耀

doi:10.13832/j.jnpe.2023.S2.0171

折流板液滴分离的OpenFOAM模拟及验证

doi: 10.13832/j.jnpe.2023.S2.0171

1.
清华大学核能与新能源技术研究院先进核能技术协同创新中心反应堆工程与安全教育部重点实验室，北京，100084
2.
皇家墨尔本理工大学工学院，墨尔本，VIC 3083

基金项目: 国家科技重大专项（2011ZX06901-003）

详细信息

作者简介:
张　申（1996—），男，博士研究生，现主要从事反应堆热工水力学分析方面的研究，E-mail: zhangshe22@mails.tsinghua.edu.cn

中图分类号: TL334
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- 文章访问数: 50
- HTML全文浏览量: 7
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2023-07-02
- 修回日期: 2023-10-08
- 刊出日期: 2023-12-30

OpenFOAM Simulation and Verification of Droplet Separation in Baffles

1.
Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Tsinghua University, Beijing, 100084, China
2.
School of Engineering, RMIT University, Melbourne, VIC 3083, Australia

摘要

摘要: 为预测折流板中的气液两相流行为，使用OpenFOAM基于Euler-Lagrangian方法以液滴为离散相、气流为连续相模拟了折流板中离散相与连续相双向耦合的流动。其中离散相受曳力作用，连续相分别使用了标准k-ε模型与k-ω SST模型进行模拟。本文介绍了网格的划分，对于OpenFOAM生成的Lagrangian粒子坐标的后处理以及基于OpenFOAM编写的折流板汽水分离效率程序。计算得到不同湍流模型在不同网格下的连续相流场、连续相速度场以及汽水分离效率与实验数据的对比。结果表明，无论是连续相还是离散相，湍流模型相较于网格对于结果的影响更大，k-ω SST模型计算结果更加准确，模型对于大尺寸直径的液滴分离效率预测准确，但是对于小直径液滴的分离效率预测不够准确。
- 折流板 /
- OpenFOAM /
- 气液两相流 /
- 分离效率 /
- 湍流模型
Abstract: In order to predict the gas-liquid two-phase flow behavior in a baffle, OpenFOAM based Euler-Lagrangian method was used to simulate the two-way coupling flow of discrete and continuous phases in a baffle, with liquid droplets as the discrete phase and gas flow as the continuous phase. The discrete phase is subject to the drag force, and the continuous phase is simulated using the standard k-ε model and the standard k-ω SST model respectively. This article introduces grid meshing, post-processing of Lagrangian particle coordinates generated by OpenFOAM, and a program based on OpenFOAM for baffle steam water separation efficiency. The continuous-phase flow field, continuous-phase velocity field and steam water separation efficiency of different turbulence models under different grids are calculated and compared with the experimental data. The results show that the turbulence model has a greater impact on the results than the grid, whether it is continuous phase or discrete phase, and the calculation results of k-ω SST model are more accurate. The model can predict the separation efficiency of large diameter droplets accurately, but cannot predict the separation efficiency of small diameter droplets accurately enough.
- Baffle plate /
- OpenFOAM /
- Gas-liquid two-phase flow /
- Separation efficiency /
- Turbulence model

HTML全文

图 1 算例的折流板几何结构^[5]

Figure 1. Geometry of Baffles

下载: 全尺寸图片幻灯片

图 2 SpaceClaim中建模的几何结构

Figure 2. Geometry in SpaceClaim Modeling

下载: 全尺寸图片幻灯片

图 3 ICEM划分的blocks以及网格

Figure 3. Blocks and Meshes in ICEM

下载: 全尺寸图片幻灯片

图 4 气流X方向的速度轮廓

Figure 4. Velocity Profile in the X-Direction of Airflow　　　

下载: 全尺寸图片幻灯片

图 5 k-ω SST模型在29673网格下的速度矢量图

Figure 5. k-ω SST Model and Velocity Vector Field with 29673 Meshes

下载: 全尺寸图片幻灯片

图 6 计算得到的汽水分离效率与实验数据对比

Figure 6. Comparison of Simulated Steam Water Separation Efficiency with Experimental Data

下载: 全尺寸图片幻灯片

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