排灌机械工程学报2025，Vol.43Issue(5)：433-440,8.DOI:10.3969/j.issn.1674-8530.23.0144
叶顶间隙对半开式卫生型离心泵能量损失的影响
Effect of tip clearance on energy loss of semi-open sanitary centrifugal pumps
摘要
Abstract
An unsteady numerical simulation method was employed to investigate the energy characte-ristics of semi-open sanitary centrifugal pumps under different tip clearances.The accuracy of this nu-merical simulation method was verified through hydraulic characteristics tests.Using entropy generation theory,both qualitative and quantitative analyses of energy loss in semi-open centrifugal pumps with varying tip clearances was conducted.Furthermore,the underlying causes of energy loss within the pump were examined.The results indicate that as the tip clearance increases,flow losses within the pump also increase,leading to a decline in the pump's hydraulic performance characteristics.Under larger clearances,high-pressure fluid from the blade working surface leaks through the tip clearance to-wards the blade backside,generating substantial leakage vortices.These leakage flows couple with the main flow to form leakage vortices,whose intensity increases with the clearance size,thereby causing greater energy losses.Under different clearance conditions,the overall distribution characteristics of energy loss within the pump remain generally similar.The total entropy generation corresponding to each flow component,ranked from largest to smallest,is the volute,blade tip clearance,impeller,and inlet pipe.The volute experiences the greatest energy loss,mainly due to the intense interaction and coupling effect between the rotor and the volute.These findings provide theoretical support for im-proving the performance of semi-open sanitary centrifugal pumps.关键词
离心泵/半开式叶轮/叶顶间隙/熵产理论/能量损失Key words
centrifugal pump/semi-open impeller/tip clearance/entropy production theory/energy loss分类
农业工程引用本文复制引用
裴吉,王振涵,陈佳,高晓飞,韩沛,王文杰..叶顶间隙对半开式卫生型离心泵能量损失的影响[J].排灌机械工程学报,2025,43(5):433-440,8.基金项目
江苏省自然科学基金资助项目(BK20230514) （BK20230514）
台州市科技计划项目(工业类)(23gyb45) （工业类）
江苏大学高级人才科研启动基金资助项目(21JDG053) （21JDG053）
