高原农业2025，Vol.9Issue(2)：249-256,8.DOI:10.19707/j.cnki.jpa.2025.02.012
高原环境下混流式水轮机空化特性及对压力脉动的影响
Cavitation Characteristics of Francis Turbine and Effect on Pressure Pulsation in Plateau Environment
摘要
Abstract
To analyze the effects of cavitation on pressure pulsation in Francis turbines at high altitudes,this study employed model experiments.The experiments of cavitation in Francis turbines model experimental platform were conducted under high-altitude environment,which was created by Vacuum Pump.The results showed that cavitation occurred earlier in the model turbine with the guide vane openings increased,and small vortex band developed under the turbine runner,which became large trumpet-shaped vortex band when cavitation reached a critical level.In addition,the turbine operated unstably and generated vibrations,which became more significant with the guide vane openings increased.Moreover,pressure pulsations showed complex change rules in different stages of cavitation.At small guide vane openings,the value of pressure pulsation increased when cavitation developed.At large guide vane openings,early cavitation in turbine created cavitation bubbles,which helped reduce the value of pressure pulsation.关键词
混流式水轮机/高原环境/空化/压力脉动Key words
Francis turbine/Plateau environment/Cavitation/Pressure pulsation分类
建筑与水利引用本文复制引用
任烁,罗红英,杜运鑫,乔雪晴,杨运平..高原环境下混流式水轮机空化特性及对压力脉动的影响[J].高原农业,2025,9(2):249-256,8.基金项目
西藏农牧学院研究生创新计划资助项目(YJS2024-47) （YJS2024-47）
高水头大容量水电机组开发关键技术(XZ202201ZD0003G04) （XZ202201ZD0003G04）
