介质黏性对叶片式气液混输泵两相流动特性的影响  

Effects of Medium Viscosity on Gas-liquid Two-phase Flow in a MultiphaseRotodynamic Pump

作　　者：张文武 余志毅[1] 李泳江 杨建鑫[1] 叶青 ZHANG Wen-Wu;YU Zhi-Yi;LI Yong-Jiang;YANG Jian-Xin;YE Qing(School of Mechanical Engineering Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《工程热物理学报》2020年第3期594-600,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51579006)。

摘　　要：为了解介质黏性对气液混输泵外特性、流场及相间作用特性的影响,选取air-water和air-crude两组介质,基于ANSYS CFX对一叶片式气液混输泵进行了数值模拟,且对相间作用模型中最为主要的阻力模型进行了修正,大大提高了较高进口含气率下的模型预测能力。由于原油的黏性较大,流动损失增加,使泵的效率和增压均相对较低。当介质为air-water和air-crude时,四种相间作用力中均是阻力占主导,湍流弥散力与阻力相比其大小可以忽略,但介质为air-crude时的气液相间作用力相对较小.To understand the effects of medium viscosity on the performance,flow field and phase interaction characteristics in the multiphase rotodynamic pump,simulations with ANSYS CFX were carried out using combinations of air-water and air-crude.The drag model regarding as the most important among the phase interaction models was modified,and especially improved the predictive ability of the model under larger IGVF conditions.Due to the viscosity of crude is greater than that of water,the flow losses were larger,thus resulting in the lower efficiency and pressure rise of the pump.For the two mediums,the drag force is dominant among these four interphase forces,and the magnitude of turbulent dispersion force can be neglected relative to others,while the corresponding interphase force for air-crude is smaller than that for air-water.

关 键 词：黏性 气液混输泵 流动特性 相间作用 数值分析 

分 类 号：TH312[机械工程—机械制造及自动化]