摘要
为研究动、静叶轮轴向间隙对螺旋轴流式多相混输泵水力性能的影响,以多相混输泵单个增压单元为研究对象,选用纯水作为运输介质,基于CFX软件对5个不同轴向间隙系数进行数值模拟,分析了不同轴向间隙系数下多相混输泵外特性、内部流动状态以及湍流耗散率的变化规律。研究结果表明:随着轴向间隙系数的增加,多相混输泵的扬程和效率均先增大、后减小,在轴向间隙系数等于0.13时扬程和效率达到最高;动、静叶轮轴向间隙系数的增加可以改善动叶轮出口以及静叶轮内的流动状况;轴向间隙系数主要影响动叶轮出口以及静叶轮进口处的湍流耗散率,并且对静叶轮进口湍流耗散率的影响大于动叶轮出口;动、静叶轮的轴向间隙系数是影响螺旋轴流式多相混输泵水力性能的重要因素。研究结果可为螺旋轴流式多相混输泵的设计与研发提供参考依据。
In order to study the influence of axial clearance of impeller and diffuser on the hydraulic performance of helical axial flow multiphase pump,taking single boosting unit of multiphase pump as the research object,selecting pure water as the transportation medium,based on CFX software,numerical simulation was conducted on five different axial clearance coefficients to analyze the changes of external characteristics,internal flow state and turbulent dissipation rate of multiphase pump under different axial clearance coefficients.The study results show that as the axial clearance coefficient increases,the head and efficiency of multiphase pump increase first and then decrease,and reach the highest when the axial clearance coefficient is 0.13;the increase of axial clearance coefficient of impeller and diffuser can improve the flow condition of impeller outlet and diffuser inside;the axial clearance coefficient mainly affects the turbulent dissipation rate at the outlet of the impeller and the inlet of the diffuser and the influence on the turbulent dissipation rate at the inlet of the diffuser is greater than that at the outlet of the impeller;and the axial clearance coefficient of impeller and diffuser is an important factor affecting the hydraulic performance of helical axial flow multiphase pump.The study results provide reference for the design,research and development of helical axial flow multiphase pump.
作者
史广泰
王彬鑫
李和林
刘宗库
Shi Guangtai;Wang Binxin;Li Helin;Liu Zongku(School of Energy and Power Engineering,Xihua University;Sichuan Provincial Key Laboratory of Fluid and Power Machinery,Ministry of Education)
出处
《石油机械》
北大核心
2021年第12期98-104,共7页
China Petroleum Machinery
基金
国家重点研发计划项目“分布式光伏与梯级小水电互补联合发电技术研究及应用”(2018YFB0905200)
中国博士后科学基金特别资助项目“考虑气体可压的油气混输泵内多相流相互作用机理研究”(2017T100077)
中国博士后科学基金面上资助项目“考虑气体可压缩性油气混输泵多工况运行机理研究”(2016M600090)
四川省教育厅科研项目“螺旋轴流式油气混输泵流动特性研究”(17ZA0366)。
关键词
多相混输泵
水力性能
数值计算
轴向间隙
外特性
CFX软件
multiphase pump
hydraulic performance
numerical calculation
axial clearance
external characteristic
CFX software
