陕西师范大学学报（自然科学版）2025，Vol.53Issue(4)：117-124,8.DOI:10.15983/j.cnki.jsnu.2024319
叶顶间隙对高速微型离心泵空化特性的影响
Effects of tip clearance on cavitation performance of high-speed micro centrifugal pumps
摘要
Abstract
The cavitation phenomenon of centrifugal pumps will seriously affect the hydraulic performance of the pump,especially the use of higher speed semi-open impeller high-speed miniature pumps,the impact of its tip clearance on the cavitation performance of the impeller is more significant,and is the main problem faced by its current research and application.The high-speed miniature semi-open impeller centrifugal pump applied to the thermal management system of airborne equipments is taken as the research object,and its full-flow field cavitation simulation is carried out.Using a combination of numerical simulation and experimental study,the cavitation performance of the centrifugal pump is investigated under different inlet cavitation margins and different tip clearance ratios(0.05,0.08,0.11 and 0.14).The results show that:the effective cavitation margin of the experimental pump increases with the increase of flow rate;the necessary cavitation margin of the pump decreases by 0.10 m for every 0.1 mm increase in the tip clearance,when the tip clearance ratio is increased by 0.03,resulting in a decrease in the anti-cavitation performance of the pump.Under different tip clearance,the smaller the tip clearance is the smaller the tip leakage flow can be obtained,the possibility of leakage vortex is reduced,improving the anti-cavitation performance of the pump.关键词
离心泵/高速离心泵/水泵/叶顶间隙/空化特性Key words
centrifugal pump/high-speed centrifugal pump/water pump/tip clearance/cavitation charac-teristics分类
机械制造引用本文复制引用
周洪,薛绒,牛奔,张蓓乐,林心怡,侯予..叶顶间隙对高速微型离心泵空化特性的影响[J].陕西师范大学学报（自然科学版）,2025,53(4):117-124,8.基金项目
国家自然科学基金(51976150) （51976150）
