水力发电2026，Vol.52Issue(9)：56-65,10.
巨型混流式水轮机宽负荷工况空化现象研究
Cavitation Phenomena of Large Francis Turbine under Wide Load Conditions
摘要
Abstract
A numerical simulation study is carried out to investigate the unsteady cavitating flow characteristics of a Francis turbine under a gross head of 135 m at typical load conditions ranging from 650 MW to 850 MW,and the simulation results are compared and validated against model test data.The calculated results indicate that noticeable cavitation only occurs near the draft cone outlet under the 850 MW load condition,with its location and morphology being generally consistent with the experimental observations.At the load conditions of 750 MW and above,multiple high-frequency peaks appear in the frequency range of 95-101 Hz,and the frequency corresponding to the maximum amplitude exhibits a regular shift with increasing load.At the load condition of 750 MW,the dominant frequency inside the draft cone is 0.94 Hz,which is significantly different from other load conditions.Under the current computational setup,the simulation results agree well with the overall trend of the experiments,demonstrating a certain degree of reliability.This study provides valuable engineering insights into the cavitation flow characteristics and the evolution of pressure fluctuations in hydraulic turbines.关键词
混流式水轮机/空化/压力脉动/数值模拟/泄水锥/尾水管涡带Key words
Francis turbine/cavitation/pressure pulsation/numerical simulation/draft tube cone/draft tube vortex rope分类
建筑与水利引用本文复制引用
罗前林,廖祥波,陶吉全,申天山,付壮,安学利..巨型混流式水轮机宽负荷工况空化现象研究[J].水力发电,2026,52(9):56-65,10.基金项目
三峡金沙江云川水电开发有限公司禄劝乌东德电厂科技项目(Z522302015) （Z522302015）
