江苏水利Issue(4)：21-26,6.
基于涡动力学诊断的叶顶间隙尺寸对混流泵性能影响的研究
Research on the effects of blade tip clearance size on mixed flow pump performance based on vortex dynamics diagnosis
摘要
Abstract
To reveal the internal mechanism of how the tip clearance size affects the performance of the mixed flow pump,the numerical simulation method is adopted to analyze the internal flow field distribution characteristics of the mixed-flow pump under different tip clearances.The research results show that the increase of tip clearance will lead to the increase of internal leakage of the pump,the rise of flow loss,and then the significant decrease of the pump head and efficiency.When the tip clearance increases from 0.5 mm to 2.0 mm,the pump head decreases by approximately 12.3%,the efficiency decreases by approximately 10.7%,and the leakage is approximately linearly related to the tip clearance.The study also found that the tip clearance has a significant impact on the pressure distribution in the pump,and the increase of the clearance expands the range of the low-pressure area in the pump,which is prone to cavitation and affects the stable operation of the pump.关键词
混流泵/叶顶间隙/涡动力学诊断/能量特性/内流Key words
mixed flow pump/blade tip clearance/vortex dynamics diagnosis/energy characteristics/internal flow分类
建筑与水利引用本文复制引用
朱智强,周琳周,李玉莹,杨雨峤,潘卫锋,王梦成..基于涡动力学诊断的叶顶间隙尺寸对混流泵性能影响的研究[J].江苏水利,2026,(4):21-26,6.基金项目
江苏省自然科学基金(青年基金)(No.SBK2023042972) （青年基金）
