排灌机械工程学报2024，Vol.42Issue(1)：1-7,7.DOI:10.3969/j.issn.1674-8530.22.0072
改变导叶翼型对水泵水轮机"S"特性的影响
Influence of guide vane airfoil profiles on pump-turbine "S" charfacteristics
摘要
Abstract
Aiming at the instability problem in the "S" characteristic region of the pump-turbine,a modified movable guide vane airfoil was proposed to improve the performance.Taking a pump-turbine model machine as the research object,the SST k-ω turbulence model was used to carry out three-di-mensional numerical calculations on the whole flow channel of the pump-turbine.By modifying the de-sign of the movable guide vane airfoil,a Q-n curve was obtained,and the improvement of the "S" characteristics of the unit was analyzed.The calculation results were compared with the test results,and the pressure pulsation analysis was carried out in the bladeless area of the unit before and after the modification of the movable guide vane airfoil.The results show that under the premise of ensuring that the overall efficiency is still maintained near 92％,the new movable guide vane airfoil still has an im-proved effect on the "S" characteristics of the unit.The pressure pulsation in the bladeless zone is main-ly caused by the aggregation of the flow in the active guide vane area and the disturbance of the rotator and stator interaction with the runner blades.The modified movable guide vanes reduce the amplitude of pressure pulsation in bladeless zone and improve the grid connection stability of the pump-turbine during operation.关键词
水泵水轮机/"S"特性曲线/活动导叶/翼型设计/数值计算Key words
pump-turbine/"S"characteristic curve/movable guide vane/airfoil design/numerical calculation分类
能源科技引用本文复制引用
李琪飞,谢耕达,韩天丁,李正贵..改变导叶翼型对水泵水轮机"S"特性的影响[J].排灌机械工程学报,2024,42(1):1-7,7.基金项目
国家自然科学基金资助项目(52066011) （52066011）
