排灌机械工程学报2025，Vol.43Issue(6)：541-546,579,7.DOI:10.3969/j.issn.1674-8530.23.0245
非均匀来流条件下多相混输泵气液两相分离激化
Intensification of gas-liquid two-phase separation in multiphase mixed-transport pump under non-uniform inflow conditions
摘要
Abstract
Aiming to elucidate the flow dynamics that lead to performance deterioration or failure at high gas volume fractions(GVF),gas-liquid two-phase separation mechanism in a helical axial multi-phase mixed-transport pump under non-uniform inflow conditions was investigated to improve operational stability and efficiency in complex inflow scenarios.By implementing nonlinear control of the pump's inlet boundary conditions via user-defined functions(UDF),two distinct non-uniform in-flow profiles,i.e.,linear and parabolic were applied.Combined with flow visualization experiments,the hydraulic characteristics and internal flow structures of the pump were systematically analyzed under these conditions.The results demonstrate that non-uniform inflows universally degrade pump per-formance and exacerbate gas-liquid separation,with linear inflow exhibiting more severe effects.In-creasing rotational speed further amplifies phase separation.Axially,gas-phase accumulation initiates at the impeller inlet:gas occupies the flow channel beyond 0.15L for linear inflow,while parabolic in-flow shows peak dispersion at 0.75L.In the blade channel,the turbulent kinetic energy of different non-uniform incoming flows is uniformly distributed in the impeller,with a peak value difference of 1.00 m2/s2.However,the turbulent kinetic energy of the linear incoming flow in the guide vane is se-verely distorted in space.The study confirms that non-uniform inflow intensifies gas-liquid separation,destabilizing pump operation.These findings provide a theoretical foundation for optimizing multiphase mixed-transport pumps in engineering applications.关键词
多相混输泵/气液两相流/非均匀来流/可视化试验/气液分离激化Key words
multiphase mixed-transport pump/gas-liquid two-phase flow/non-uniform inflow/visualization testing/gas-liquid separation分类
农业工程引用本文复制引用
权辉,王智胜,冯冰,王子源,李嘉仪,史广泰..非均匀来流条件下多相混输泵气液两相分离激化[J].排灌机械工程学报,2025,43(6):541-546,579,7.基金项目
国家自然科学基金资助项目(51969014) （51969014）
甘肃省杰出青年基金资助项目(20JR10RA204) （20JR10RA204）
甘肃省陇原创新创业人才计划项目(2022年度人才发展专项)(2022LQGR51) （2022年度人才发展专项）
兰州理工大学红柳优秀青年人才支持计划项目 （）
