Chemical Industry and Engineering Progress ›› 2017, Vol. 36 ›› Issue (08): 2822-2829.DOI: 10.16085/j.issn.1000-6613.2016-2339

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Characteristics on gas-liquid two-phase flow in large inclination upward pipe

WANG Quan1,2, LI Yuxing1,2, HU Qihui1,2, WANG Lin3, LIU Chang4   

  1. 1. College of Pipeline and Civil Engineering in China University of Petroleum, Qingdao 266580, Shandong, China;
    2. Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety Engineering, Qingdao 266580, Shandong, China;
    3. School of Mechanics and Engineering in Southwest Jiaotong University, Chengdu 610031, Sichuan, China;
    4. Beijing Aviation Oil Construction Limited Company, Beijing 100012, China
  • Received:2016-12-19 Revised:2017-03-15 Online:2017-08-05 Published:2017-08-05

大倾角上倾管气液两相流动特性

王权1,2, 李玉星1,2, 胡其会1,2, 王琳3, 刘昶4   

  1. 1. 中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580;
    2. 山东省油气储运安全省级重点实验室, 山东 青岛 266580;
    3. 西南交通大学力学与工程学院, 四川 成都 610031;
    4. 北京中航油工程建设有限公司, 北京 100012
  • 通讯作者: 李玉星,教授,博士生导师,主要从事油气水混输工艺技术、输气管道运行模拟仿真技术、天然气水合物技术、深水流动保障技术等方面的研究。
  • 作者简介:王权(1992-),男,硕士研究生,研究方向为气液两相流。E-mail:wangq@s.upc.edu.cn。
  • 基金资助:
    国家自然科学基金项目(51404290)。

Abstract: Large inclination upward pipe is common in hilly terrain area. In this paper, flow patterns were obtained and gas-liquid two-phase flow pressure fluctuations in the upward pipe were measured using an indoor experiment apparatus. Six flow patterns were observed during the experiment. Both time domain,PDF(probability distribution function),CDF(cumulative distribution function)and PSD(power spectral density)characteristic values of the pressure fluctuation under different superficial gas velocity as well as superficial liquid velocity and angle were obtained. Results showed that,due to the expansion of the gas and the inertia of the slug in the large inclination,the pressure value of the pressure sensing point would be lower than the higher point during the blowout of severe slugging. The characteristics of time domain,PDF,CDF and PSD characteristic values of the pressure fluctuation under different superficial gas velocity,superficial liquid velocity and angle were compared and analyzed,which can be used to identify flow patterns and provide reference for selection of equipment and the security operation of pipelines. Distributions of PDF showed single-peak and dual-peak. The slope,knee,and distribution of CDF were different for different flow patterns. Distributions of PSD showed single-peak,dual-peak,triple-peak,multi-peak and no-peak. The period and the value of pressure fluctuation of severe slugging increase with the angle augmented.

Key words: upward pipe, gas-liquid transportation, flow patterns, pressure fluctuation, PDF, CDF, PSD

摘要: 针对地形起伏区域常见的大倾角上倾管气液两相流动问题,利用室内实验装置进行气液混输实验,对气液两相流的流型、压力波动特性进行了研究。实验中观测到6种流型,得到了不同气液流量和倾角下压力波动的时域值、概率密度函数(PDF)、累积分布函数(CDF)和功率谱密度(PSD)特征。实验结果分析表明:由于气体的膨胀和段塞运动的惯性,严重段塞流气液喷发阶段时,上倾管上部会出现下部压力小于上部压力的现象;得到了不同折算气速、折算液速和倾角的压力信号并进行统计学分析;PDF呈单峰或双峰分布;不同流型的CDF的斜率、拐点和曲线位置不同;PSD图会出现一阶、二阶、三阶和多阶波峰,甚至无波峰分布;在同等气液流量下,随着倾角的增加,严重段塞流的周期和压力波动值增大;结合压力波动特性及对应分析结果可以进行流型识别并对设备的选型以及管道的安全运行提供参考。

关键词: 上倾管, 气液混输, 流型, 压力波动, 概率密度函数, 累积分布函数, 功率谱密度

CLC Number: 

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