流体机械2025，Vol.53Issue(3)：17-25,9.DOI:10.3969/j.issn.1005-0329.2025.03.003
停输管道再启动过程油水两相流型演变与压降变化特性
Characteristics of oil-water two-phase flow pattern evolution and pressure drop change during restart of shutdown pipeline
摘要
Abstract
To address restart challenges in heavy oil-water ring pipelines caused by water ring instability,an experimental study was conducted using a laboratory-scale restart loop system with four conventional heavy oils.The research investigated flow pattern evolution and pressure drop characteristics during pipeline restart under constant water velocity,analyzing effects of oil holdup(Ho),oil viscosity(μo),shutdown duration(tst),and water velocity(Ucl).An exponential decay model was established to describe time-dependent restart pressure drop.Results reveal four distinct flow pattern phases during constant-flow restart:water shear stripping of oil layer,oil droplet/cluster migration,wall-adherent film formation and film detachment.The pressure drop exhibits initial peak followed by decay and equilibrium stages,with model predictions showing excellent agreement(goodness-of-fit values approaching 1).Within tested ranges(Ho=0.26～0.76,μo=1.055 3～3.02 Pa·s,tst=0.5～1.0 h,Ucl=0.25～1.01 m/s),maximum restart pressure drop increases with Ho,μo,tst,and Ucl(up to 30.38 kPa),while restart duration extends with Ho,μo,and tst but shortens with Ucl(up to 3 616.78 s).This study provides theoretical and practical guidance for optimizing pipeline restart operations.关键词
稠油/水环/再启动特性/再启动压降/预测模型Key words
heavy oil/water ring/restart characteristics/restart pressure drop/predictive model分类
石油、天然气工程引用本文复制引用
尹晓云,李静,申俊,刘力华,赵梓涵,朱祯,敬加强,KARIMOV Rinat M..停输管道再启动过程油水两相流型演变与压降变化特性[J].流体机械,2025,53(3):17-25,9.基金项目
国家自然科学基金项目(U19B2012,52106208) （U19B2012,52106208）
四川省自然科学基金项目(2023NSFSC0924) （2023NSFSC0924）
