不同叶顶间隙下进口含气率对混输泵做功性能的影响  

Effect of inlet gas volume fraction in different tip clearances on work performance of multiphase pump

作　　者：肖业祥[1,2] 刘洁 李海军 陶思佳 史广泰[4] XIAO Yexiang;LIU Jie;LI Haijun;TAO Sijia;SHI Guangtai(State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China;Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;China Three Gorges Construction(Group)Co.,Ltd.,Chengdu,Sichuan 610095,China;Key Laboratory of Fluid and Machinery and Engineering,Xihua University,Chengdu,Sichuan 610039,China)

机构地区：[1]清华大学水圈科学与水利工程全国重点实验室,北京100084 [2]清华大学能源与动力工程系,北京100084 [3]中国三峡建工(集团)有限公司,四川成都610095 [4]西华大学流体及动力机械教育部重点实验室,四川成都610039

出　　处：《排灌机械工程学报》2025年第3期217-223,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(52279088);水圈科学与水利工程全国重点实验室开放研究基金资助项目(sklhse-2022-KY-06,sklhse-2023-E-04)。

摘　　要：为研究不同叶顶间隙下进口含气率对多相混输泵流道内能量转换规律的影响,应用ANSYS CFX软件对多相混输泵内气液两相流动进行数值模拟,并分析混输泵内动扬程、静扬程、功率变化以及各截面能量密度的分布规律,揭示同时考虑叶顶间隙和含气率下多相混输泵内的能量转换特性.研究结果表明:叶顶间隙的增大对混输泵叶轮做功性能影响极大,当轴向系数为0.4时,混输泵在叶顶间隙为1.0,1.5 mm下分别呈现出动扬程极大值约为5,6 m;含气率的增大使得叶轮后半段静扬程逐渐减小,叶轮增压性能降低,其中在叶轮出口静扬程降低最明显,最大下降幅度高达10.02%;随着含气率的增大,叶轮流道内的静功率和总功率均有一定提升,叶顶间隙及含气率的增大都使得流道中部功率密度较大的区域面积产生明显的增大.研究结果可为精确预测混输泵的做功性能提供一定参考.To investigate the influence of inlet gas volume fraction(IGVF)on the energy conversion dynamic in the flow passage of the multiphase pump under different tip clearances,numerical simulations of two-phase flow in the multiphase pump were conducted by using ANSYS CFX software.By studying the dynamic head,static head,power variation,and energy density distribution across diffe-rent sections of the multiphase pump,the energy conversion characteristics in the pump with consideration of tip clearances and IGVF were revealed.The research results show that the increase of tip clea-rance has a great impact on the power performance of the impeller of the pump.The maximum operation head of the multiphase pump is about 5 m and 6 m at the axial coefficient of 0.4 under the working conditions of tip clearances of 1.0 mm and 1.5 mm,respectively.With the increase of IGVF,the static head of the second half of the impeller decreases gradually,and the pressurizing performance of the impeller decreases.Among them,the static head at the impeller outlet decreases the most significantly,with a maximum decrease of 10.02%.With the increase of IGVF,both the static power and total power in the impeller passage are increased to a certain extent.The increase of tip clearance and IGVF leads to a sig-nificant increase in the area with larger power density in the middle of the passage.The research results can provide some reference for accurately predicting the power performance of multiphase pumps.

关 键 词：多相混输泵 叶顶间隙 进口含气率 做功性能 扬程 

分 类 号：S277.9[农业科学—农业水土工程] TH312[农业科学—农业工程]