突缩突扩圆管内离散油滴运动行为及变形特性

doi:10.16085/j.issn.1000-6613.2023-2202

化工进展 ›› 2025, Vol. 44 ›› Issue (1): 27-37.DOI: 10.16085/j.issn.1000-6613.2023-2202

突缩突扩圆管内离散油滴运动行为及变形特性

邢雷¹^,²^,³(), 周晓庆¹, 蒋明虎¹^,²(), 赵立新¹^,², 李新亚¹, 陈德海¹

^1.东北石油大学机械科学与工程学院，黑龙江大庆 163318
^2.黑龙江省石油石化多相介质处理及污染防治重点实验室，黑龙江大庆 163318
^3.大庆油田博士后科研工作站，黑龙江大庆 163458

收稿日期:2023-12-14 修回日期:2024-03-01 出版日期:2025-01-15 发布日期:2025-02-13
通讯作者: 蒋明虎
作者简介:邢雷（1990—），男，博士，副教授，博士生导师，研究方向为多相介质分离与同井注采技术。E-mail：Nepuxinglei@163.com。
基金资助:
国家自然科学基金青年基金(52304064);国家自然科学基金区域创新发展联合基金重点支持项目(U21A20104);中国博士后科学基金(2023M730481);黑龙江省自然科学基金(LH2022E017);黑龙江省博士后资助项目(LBH-Z23039)

Motion behavior and deformation characteristics of discrete oil droplets in a sudden contraction and sudden expansion round pipe

XING Lei¹^,²^,³(), ZHOU Xiaoqing¹, JIANG Minghu¹^,²(), ZHAO Lixin¹^,², LI Xinya¹, CHEN Dehai¹

^1.School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
^2.Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention, Daqing 163318, Heilongjiang, China
^3.Postdoctoral Research Workstation in Daqing Oilfield, Daqing 163458, Heilongjiang, China

Received:2023-12-14 Revised:2024-03-01 Online:2025-01-15 Published:2025-02-13
Contact: JIANG Minghu

摘要/Abstract

摘要：

离散油滴在变截面管道内的运动及变形特性是揭示两相流动机理的核心问题之一。以突缩突扩圆管内的离散油滴为研究对象，采用数值模拟与高速摄像实验相结合的方法，针对不同入口雷诺数条件下突缩突扩圆管内的油滴运动行为及变形特性开展研究。结果表明：在突缩突扩圆管内，当入口雷诺数相同时，随着离散油滴粒径的增大，管内入口端及突缩区压力增大，突扩区压力回升加快，且油滴最大变形量在细管段。当油滴粒径不变时，随着入口雷诺数的增大，管内离散油滴变形量越大，油滴在管道内初始破碎位置越靠近突扩双肩且破碎程度越剧烈。当Re=6.3×10³时，油滴的变形量达到最大值0.84，初始破碎位置在距离突扩双肩33.2mm处。得到了不同入口雷诺数及油滴粒径条件下突缩突扩圆管内离散油滴的运动、变形及破碎规律，为地面原油集输管网中油水两相流混输强化提供了理论参考。

关键词: 数值模拟, 油滴, 两相流, 流动, 运动行为, 变形特性

Abstract:

The motion and deformation characteristics of discrete oil droplets in a pipe with variable cross-section was one of the core problems in revealing the mechanism of two-phase flow. The discrete oil droplets inside the sudden contraction and sudden expansion round pipe were taken as the research object, and numerical simulation and high-speed camera experiment were combined to study the motion and deformation characteristics of oil droplets inside the sudden contraction and sudden expansion round pipe under different inlet Reynolds numbers. The results showed that in the sudden contraction and sudden expansion round pipe, at conditions of the same Reynolds number, as the particle size of the discrete oil droplet increased, the pressure at the inlet end of the pipe and in the sudden construction zone increased, the pressure rose faster in the area of sudden expansion, and the largest deformation of oil droplets was in the thin pipe section. Simultaneously, when the particle size of oil droplets unchanged, the deformation of discrete oil droplets in the pipe increased with the increase of inlet Reynolds number, and the initial broken position of the oil droplets in the pipe was closer to the shoulder of the protruding axis and the degree of brokenness was more intense. What's more, when Re=6.3×10³, the deformation of oil droplets reached the maximum value of 0.84 and the initial crushing position was 33.2mm away from the shoulders of sudden expansion. In addition, the motion, deformation and fragmentation laws of discrete oil droplets in the sudden contraction and sudden expansion round pipe under different inlet Reynolds numbers and oil droplet sizes were obtained. Thus, this paper provided theoretical reference for strengthening oil-water two-phase flow mixed transport in surface crude oil gathering and transportation network.

Key words: numerical simulation, oil droplet, two-phase flow, flow, motor behavior, deformation properties

中图分类号:

TQ019

邢雷, 周晓庆, 蒋明虎, 赵立新, 李新亚, 陈德海. 突缩突扩圆管内离散油滴运动行为及变形特性[J]. 化工进展, 2025, 44(1): 27-37.

XING Lei, ZHOU Xiaoqing, JIANG Minghu, ZHAO Lixin, LI Xinya, CHEN Dehai. Motion behavior and deformation characteristics of discrete oil droplets in a sudden contraction and sudden expansion round pipe[J]. Chemical Industry and Engineering Progress, 2025, 44(1): 27-37.

图/表 14

图1 突缩突扩圆管结构图及尺寸

图2 不同网格数量下的油滴表面积

图3 流体域模型网格划分

图4 实验装置及工艺流程图1—蓄水池；2—LM60智能蠕动泵；3—流量计；4—球阀门；5—变径三通；6—微量注射器；7—微量注射泵；8—蠕动泵控制器；9—废水池；10—RGB LED摄影灯；11—突缩突扩圆管样机；12—高速摄像机

图5 管内YZ截面压力分布和速度矢量云图

图6 突缩突扩圆管内不同时刻管内轴向中心线各位置压力变化点线图

图7 不同油滴粒径压力变化图

图8 突缩突扩圆管内不同时刻速度变化点线图

图9 未破碎油滴的变形过程

图10 部分破碎油滴的变形过程

图11 完全破碎油滴的变形过程

图12 不同直径油滴变形破碎图

图13 不同时刻轴向位置湍流动能变化

图14 不同雷诺数下油滴破碎位置及颗粒分布

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突缩突扩圆管内离散油滴运动行为及变形特性

Motion behavior and deformation characteristics of discrete oil droplets in a sudden contraction and sudden expansion round pipe

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