西华大学学报（自然科学版）2025，Vol.44Issue(3)：1-11,18,12.DOI:10.12198/j.issn.1673-159X.5062
圆盘通孔型离心泵的内外特性分析
Study on the Internal and External Characteristics of the Centrifugal Pump with the Impeller of Columnar Passages
摘要
Abstract
In order to investigate the performance of the centrifugal pump with the impeller of colum-nar passages,a centrifugal pump with the impeller of columnar passages with a ratio of 17 speed was pre-liminarily designed based on the design method of partial flow pump,and the high-precision unsteady nu-merical simulation of the full-flow field was carried out by the detach eddy simulation(DES)turbulence model,and the change law of the internal and external characteristics of the centrifugal pump with the im-peller of columnar passages under different working conditions was discussed.The results indicate that near the design operating point,the sensitivity of the pump head to the flow change is weak,which is in line with the variable flow and constant pressure characteristics of some flow pumps;the maximum pump efficiency is achieved at 1.7Qd condition;in the whole working range,there are stall vortices at the columnar passages inlet,and the stall vortex strength is negatively correlated with the flow rate;the fluctuation amplitude of the pressure gradient and relative velocity in the columnar passages increases with the increase of the flow;the pressure pulsation at the columnar passages inlet,near the volute throat and in the diffusion tube shows a trend of first rising and then falling with the increase of flow.That is,the pressure pulsation at the colum-nar passages entrance and near the volute throat reaches a maximum near the 1.7Qd condition,and the pres-sure pulsation in the diffusion tube reaches a maximum near the 1.4Qd condition;with the increase of the ra-dius,the pressure pulsation in the columnar passages gradually decreases,and decreases the fastest in the radius of 0.04 m to 0.06 m,up to 55.98%.关键词
圆盘通孔型叶轮/数值模拟/内外特性分析/压力脉动/失速涡Key words
impeller with columnar passages/numerical simulation/internal and external characteristic analysis/pressure pulsation/stall vortex分类
机械制造引用本文复制引用
杨从新,尤宇航,王文涛,郭艳磊..圆盘通孔型离心泵的内外特性分析[J].西华大学学报（自然科学版）,2025,44(3):1-11,18,12.基金项目
国家自然科学基金(51866009). （51866009）
