华中科技大学学报（自然科学版）2026，Vol.54Issue(4)：156-161,6.DOI:10.13245/j.hust.240666
基于数据同化的液环真空泵内部流动分析
Internal flow analysis of liquid ring vacuum pump based on data assimilation
摘要
Abstract
To address the significant deviation between numerical simulation and experimental test results caused by the complex gas-liquid two-phase flow in liquid ring pumps,and to overcome the limitations in the number and locations of experimental measurement points,the ensemble Kalman filter(EnKF)method was employed to assimilate the flow field of the liquid ring pump based on numerical simulation and limited experimental test data.Latin hypercube sampling was used to generate combined samples of the turbulence coefficients in the Renormalization Group(RNG)k-ε model.Assimilation analysis of the turbulence model coefficients was performed based on pressure data from four measurement points on the inner wall of the pump casing.The error between the assimilated results and the experimental observations is 2.77％,which represents a reduction of 1.53％compared to the original computational fluid dynamics(CFD)prediction error.A comparison of the post-assimilation flow field characteristics show that constrained by the experimental values on the inner wall of the casing,the overall pressure inside the pump is increased to some extent.Compared with the original CFD results,the influence of the assimilated phase field is mainly observed in the gas-liquid interface region.After assimilation,the turbulent viscosity coefficient Cμ decreases,leading to a reduction in local momentum dissipation and a corresponding increase in the velocity distribution.Meanwhile,the decrease in the turbulence dissipation rate coefficient C1ε,and the increase in C2ε result in a reduction of turbulence dissipation rate and an increase in turbulent kinetic energy.关键词
液环泵/气液两相流/数据同化/集合卡尔曼滤波/湍流模型Key words
liquid ring pump/gas-liquid two-phase/data assimilation/ensemble Kalman filter/turbulence model分类
机械制造引用本文复制引用
张人会,左思宇,陈学炳,张忱..基于数据同化的液环真空泵内部流动分析[J].华中科技大学学报（自然科学版）,2026,54(4):156-161,6.基金项目
甘肃省重大专项资助项目(23ZDGH001) （23ZDGH001）
中央引导地方专项资助项目(23ZYQA0320) （23ZYQA0320）
国家自然科学基金资助项目(51979135) （51979135）
甘肃省双一流重点项目(057047). （057047）
