可逆式水轮机叶轮液压力数值仿真分析与研究  

Analysis and Research on Numerical Simulation of Hydraulic Pressure of Reversible Hydroturbine Impeller

作　　者：黎福尧 李志彬 LI Fu-yao;LI Zhi-bin(Dongguan Canal Governance Center,Dongguan 523000,China;South China University of Technology,School of Mechanical&Automotive Engineering,Guangzhou 510000,China)

机构地区：[1]东莞市运河治理中心,广东东莞523000 [2]华南理工大学机械与汽车工程学院,广东广州510000

出　　处：《云南水力发电》2023年第4期241-244,共4页Yunnan Water Power

摘　　要：叶轮液压力可引起水轮机强烈振动,造成水轮机异常停机等严重问题,影响抽水蓄能发电站的安全运行。通过数值模拟,定量分析了可逆式水轮机叶轮液压力。液压力幅值及其分量主要决定于水轮机模式、自由模式(空载)、泵模式等操作条件及导叶开度。例如,与轴平行的轴向力在水轮机模式中为主导力,而与轴垂直的垂直力在自由模式和泵模式中为主导力。基于数值分析,通过对叶轮流体状态研究,进一步揭示了液压力的物理来源。The hydraulic pressure of impeller can cause strong vibration of turbine,cause serious problems such as abnormal shutdown of turbine,and affect safe operation of pumped storage power station.Through numerical simulation,the hydraulic pressure of reversible turbine impeller is quantitatively analyzed in this paper.The hydraulic pressure amplitude and its components are mainly determined by operating conditions such as turbine mode,free mode(no-load),pump mode and guide vane opening.For example,axial forces parallel to the shaft are dominant in turbine mode,while vertical forces perpendicular to the shaft are dominant in free mode and pump mode.Based on the numerical analysis,the physical source of hydraulic pressure is further revealed by studying the fluid state of impeller.

关 键 词：水轮机 液压力 数值仿真 涡流 

分 类 号：TV734.2[水利工程—水利水电工程]