Research progress of gas-liquid two-phase flow splitting character at impacting T-junction

doi:10.16085/j.issn.1000-6613.2020-2244

Abstract

Abstract:

When the two-phase flow passes an impacting T-junction, the gas-liquid two-phase may split unevenly in the downstream pipelines, and severe mal-splitting has a significant effect on the safety and efficiency of downstream equipment. Up to now, the branching tee has been widely studied, but little attention has been paid on the split characteristics of the impacting tee. Based on the analysis of the experiment, model, and theory experiment, this paper reviews the existing problems of two-phase flow splitting at impacting T-junction, and looks forward to the future research direction. This paper describes the experiments of impacting tee with different angles and the impacting tee with the inclined line. The phenomenological model based on the streamline division method and the mechanism model based on the pipeline pressure drop are summarized. The influence of the direction of the branch pipe, the flow pattern at the entrance of the T-junction, the symmetry of the downstream pipeline, the flow state in the inclined pipes, and the pressure drop in the downstream pipeline on the gas-liquid two-phase flow characteristics are summarized. The future research direction is clarified, the next research work can be carried out to improve the prediction accuracy by improving the gas-liquid two-phase flow split model, and to study the two-phase flow split character at the T-junction by combining the flow state in the downstream pipelines with the momentum balance theory.

Key words: gas-liquid two-phase flow, T-junction, split character, model, momentum balance

摘要：

气液两相流流经T形管时，两相流流量通常在支管中分布不均，严重影响下游设备的运行效率和运行安全。截至目前，国内外学者对分支型T形管进行了大量研究，但是很少有人关注冲击型T形管处的分流特性。本文从实验、模型和理论等角度进行分析，详细回顾了冲击型T形管处两相流分流存在的问题，并展望了未来的研究方向。本文描述了不同角度的冲击型T形管以及水平冲击型T形管后连接不同角度的分支管路等实验，概述了以流线划分方法为基础的现象学模型和以管路压降为基础的机理模型，总结了分支管路的方向、T形管入口处气液两相流型、T形管下游管路对称性、T形管下游立管中两相流的流动状态以及下游管路中压降等重要因素对气液两相流分流特性的影响，阐明了未来的研究方向。提出下一步的研究工作可以从改进气液两相流分流模型以提高预测精度、将下游分支管路中的流动状态与动量平衡理论相结合来研究T形管处两相流分流等方面开展。

关键词: 气液两相流, T形管, 分流特性, 模型, 动量平衡

CLC Number:

TE832

MA Lihui, HE Limin, MI Xiangran, CHEN Shujiong, LI Xiaowei. Research progress of gas-liquid two-phase flow splitting character at impacting T-junction[J]. Chemical Industry and Engineering Progress, 2021, 40(11): 5919-5928.

马立辉, 何利民, 米祥冉, 陈舒炯, 李晓伟. 冲击型T形管处气液两相流分流特性研究进展[J]. 化工进展, 2021, 40(11): 5919-5928.

Figures/Tables 1

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