垂直环空内气液两相流多尺度算法及模拟研究

伍磊; 刘海湖; 张明乾; 张孟祎; 王宁宁; 王志恒; 席光

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垂直环空内气液两相流多尺度算法及模拟研究

更新时间：2025-11-18

- 垂直环空内气液两相流多尺度算法及模拟研究
- Multiscale Algorithm and Simulation Study of Gas-Liquid Two-Phase Flow in Vertical Annulus
- 西安交通大学学报 2025年
- 作者机构：
  
  1.西安交通大学能源与动力工程学院,陕西省西安市710049
  2.中广核工程有限公司核电安全技术与装备全国重点实验室,广东省深圳市518100
- 作者简介：
- 基金信息：
  
  水气交替微观驱油机理及三相流模型研究(12072257);空间微重力流体物理与热物理研究(2022YFF0503500)
- DOI：
  中图分类号：
- 收稿：2025-04-26，
  
  修回：2025-08-18，
  
  录用：2025-08-26，
- 稿件说明：
移动端阅览
伍磊, 刘海湖, 张明乾, 等. 垂直环空内气液两相流多尺度算法及模拟研究[J/OL]. 西安交通大学学报, 2025.

WU Lei, LIU Haihu, ZHANG Mingqian, et al. Multiscale Algorithm and Simulation Study of Gas-Liquid Two-Phase Flow in Vertical Annulus[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY, 2025.
伍磊, 刘海湖, 张明乾, 等. 垂直环空内气液两相流多尺度算法及模拟研究[J/OL]. 西安交通大学学报, 2025. DOI：

WU Lei, LIU Haihu, ZHANG Mingqian, et al. Multiscale Algorithm and Simulation Study of Gas-Liquid Two-Phase Flow in Vertical Annulus[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY, 2025. DOI：

摘要

为深入探究垂直环空内气液两相流动规律，本文通过集成Tomiyama曳力与升力模型、碰撞聚并模型以及DBM-to-VOF转换算法，在OpenFOAM框架下开发了DBM-VOF多尺度耦合求解器，并通过系列典型算例验证了其准确性与有效性。基于该求解器，对垂直环空内气液两相流进行数值模拟，识别了泡状流、弹帽流、段塞流和搅拌流四种典型流型，并构建了气液两相流型图。研究结果表明：泡状流含气率曲线波动平缓，其PDF曲线呈狭窄陡峭的单峰结构；弹帽流含气率曲线波动较大，PDF曲线为单峰结构且在较高含气率区域形成宽尾；段塞流含气率曲线呈周期性剧烈波动，PDF曲线为双峰结构；搅拌流含气率曲线呈现周期性大振幅波动，其均值显著高于其他流型，PDF曲线在高含气率位置呈现单峰，并在低含气率区域形成宽尾。所建立的流型图与前人实验结果基本吻合，但在一定表观液速下，本文流型图中段塞流向搅拌流转换所需的表观气速更低。本研究为垂直环空内气液两相流动的机理研究提供新的数值工具，并为相关工程应用中的流型预测与优化提供理论支持。

Abstract

To deeply investigate the gas-liquid two-phase flow characteristics in vertical annuli

a DBM-VOF multiscale coupled solver is developed within the OpenFOAM framework by integrating the Tomiyama drag and lift models

collision-coalescence model

and DBM-to-VOF conversion algorithm. The accuracy and effectiveness of the solver are validated through a series of benchmark cases. Based on this solver

numerical simulations of gas-liquid two-phase flow in a vertical annulus are conducted

identifying four typical flow patterns: bubbly flow

cap-bubbly flow

slug flow

and churn flow

and a gas-liquid two-phase flow pattern map is constructed. Results reveal that the gas fraction evolution curve for bubbly flow exhibits smooth fluctuations

with its PDF curve showing a narrow and steep single-peak structure. For cap-bubbly flow

the gas fraction evolution curve fluctuates more significantly

with its PDF curve presenting a single-peak structure and a wide tail in higher gas fraction regions. The gas fraction evolution curve for slug flow displays periodic and intense fluctuations

with its PDF curve exhibiting a double-peak structure. In the case of churn flow

the gas fraction evolution curve shows periodic large-amplitude fluctuations

with its mean value significantly higher than other flow patterns

and its PDF curve featuring a single peak in high gas fraction regions and a wide tail in low gas fraction regions. The constructed flow pattern map aligns well with previous experimental results

but under certain superficial liquid velocities

the transition from slug to churn flows occurs at a lower superficial gas velocity. This research provides a novel numerical tool for understanding the mechanisms of gas-liquid two-phase flow in vertical annuli and offers theoretical support for flow pattern prediction and optimization in related engineering applications.

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