轴流泵进水池内消涡装置优化设计研究  

Research on Optimization Design of Vortex Suppression Device in an Axial Flow Pump Sump

作　　者：叶露曦 刘鹏[2] 李明慧 刘辉 宋希杰 YE Luxi;LIU Peng;LI Minghui;LIU Hui;SONG Xijie(College of Hydraulic Energy and Power Engineering,Yangzhou University,Yangzhou 225009,China;Jianghe Electromechanical Equipment Engineering Co.,Ltd.,Beijing 100071,China;Shandong Main Line Co.,Ltd.,of the East Route of the South to North Water Diversion Project,Ji'nan 250100,China)

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]江河机电装备工程有限公司,北京100071 [3]南水北调东线山东干线有限责任公司,山东济南250100

出　　处：《大电机技术》2024年第4期104-110,132,共8页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金(52306042)。

摘　　要：本文针对工程中存在的漩涡危害机组安全运行的问题,以进水池内附底漩涡为对象,基于漩涡的动力特性设计带消涡叶片的消涡导轮,消涡叶片和导轮采用流线式结构,设计了消涡叶片数分别为4、6、8三种方案,采用数值模拟和模型试验研究了消涡叶片数对消涡效果和水泵性能的影响。研究结果表明:速度梯度是漩涡产生的关键因素,速度梯度差异导致漩涡的产生,欲消除漩涡需要减小速度梯度分布差异,保证流动分布均匀。消涡叶片数影响消涡效果和水泵性能,消涡叶片数为4片时导轮附近存在局部小尺度漩涡;消涡叶片数为8片时,在导轮附近产生较大的局部水力损失;消涡叶片数为6片时消涡效果最好、消涡导轮附近产生的局部水力损失最小,泵装置效率提高1.0~1.3个百分点。消涡叶片数过小消涡不彻底,消涡叶片数过多,会减少过流量,增加额外的损失,只有保证消涡措施产生的水力损失小于漩涡产生的水力损失,消涡措施才是最有效的。Based on the dynamic characteristics of vortices,a vortex shedding guide wheel with vortex shedding blades was designed.The vortex shedding blades and guide wheels adopt a streamline structure,and three schemes with vortex shedding blades of 4,6 and 8 were designed.The influence of the number of vortex shedding blades on the vortex shedding effect and pump performance was studied.The research results indicate that velocity gradient is a key factor in the generation of vortices,and the difference in velocity gradient leads to the generation of vortices.To eliminate vortices,it is necessary to reduce the difference in velocity gradient distribution and ensure uniform flow distribution.The number of anti-vortex blades affects the anti-vortex effect and water pump performance.When the number of anti-vortex blades is 4,there are local small-scale vortices near the guide wheel.When the number of anti-vortex blades is 8,significant local hydraulic losses occur near the guide wheel.When the number of anti-vortex blades is 6,the anti-vortex effect is the best,the local hydraulic loss generated near the anti-vortex guide wheel is the smallest,and the efficiency of the pump device is improved by 1.0~1.3 percentage points.If the number of vortex shedding blades is too small,the vortex shedding is not thorough.If the number of vortex shedding blades is too large,it will reduce the flow rate and increase additional losses.

关 键 词：漩涡 消涡导轮 轴流泵 数值模拟 模型试验 

分 类 号：TH312[机械工程—机械制造及自动化]