垂直管气液两相流中压力降Orkiszewski预测模型的改进  

Improvement of Orkiszewski prediction model for pressure drop in vertical pipe gas-liquid two-phase flow

作　　者：董勇[1] 罗雅琴 罗威[2,3] 廖锐全[2,3] 李梦霞[2,4] DONG Yong;LUO Yaqin;LUO Wei;LIAO Ruiquan;LI Mengxia(School of Information and Mathematics,Yangtze University,Jingzhou 434023,Hubei;Laboratory of Multiphase Pipe Flow,Gas Lift Innovation Center(Yangtze University),Wuhan 430100,Hubei;School of Petroleum Engineering,Yangtze University,Wuhan 430100,Hubei;School of Computer Science,Yangtze University,Jingzhou 434023,Hubei)

机构地区：[1]长江大学信息与数学学院,湖北荆州434023 [2]气举试验基地多相流研究室(长江大学),湖北武汉430100 [3]长江大学石油工程学院,湖北武汉430100 [4]长江大学计算机科学学院,湖北荆州434023

出　　处：《长江大学学报（自然科学版）》2022年第6期70-77,共8页Journal of Yangtze University(Natural Science Edition)

基　　金：国家自然科学基金项目“多种通讯约束下网络化智能系统的性能分析与优化设计”(62173049);湖北省教育厅科研项目“气举配气的耦合优化模型及其加速多峰PSO算法研究”(D20211302)。

摘　　要：与垂直管中气液两相流压力降的实验数据比较,Orkiszewski模型预测的压力降,其平均相对误差达到63.62%,最大相对误差达98.07%。针对Orkiszewski模型预测相对误差偏大的问题,首先介绍了实验数据的获取过程,然后结合实验数据,指出Orkiszewski模型对环雾流流型的预测误差较小,对段塞流流型和过渡流流型的预测误差偏大。对Orkiszewski模型的参数进行了敏感性分析,结果表明液体分布系数模型中的阈值是敏感性最强的参数。同时通过分析Orkiszewski模型的组成结构,指出段塞流流型中的液体分布系数计算公式复杂。为此,提出了一种新的液体分布系数阈值模型,得到了一种改进的Orkiszewski模型。实验数据的计算结果表明了改进模型的优越性,改进模型的预测平均相对误差降低到34.98%。针对油相连续且总流速达到3.048m/s的段塞流流型数据,改进模型的平均相对误差可以从原模型的76.17%降低为17.21%。Compared with the experimental data of pressure drop of gas-liquid two-phase flow in vertical pipe,the mean relative error of pressure drop predicted by Orkiszewski model is 63.62%,and the maximum relative error of the model is 98.07%.To address the problem of large relative error in the prediction of Orkiszewski model,on the basis of the first introduction of the process of acquiring experimental data and the followed combination with the obtained experimental data,it is pointed out that the Orkiszewski model has a small error in predicting the annular-mist flow pattern,but a large error in predicting the slug flow pattern and transition flow pattern.The sensitivity analysis of parameters of Orkiszewski model shows that the threshold value of liquid distribution coefficient is the most sensitive parameter.Meanwhile,by analyzing the constituent structure of Orkiszewski model,it is pointed out that the formula for calculating the liquid distribution coefficient in the slug flow pattern is very complex.Therefore,a new threshold model of liquid distribution coefficient was proposed and an improved Orkiszewski model was obtained in this paper.The calculation results of experimental data show the superiority of the improved model,and the average relative error of the improved model is reduced to 34.98%.For the slug flow pattern with continuous oil phase and total flow velocity of 3.048 m/s,the average relative error of the improved model can be reduced from 76.17% of the original model to 17.21%.

关 键 词：气液两相流 垂直管 压力降预测 Orkiszewski模型 液体分布系数 

分 类 号：TE35[石油与天然气工程—油气田开发工程]