水泵水轮机导叶卡门涡数值模拟研究

Jingshi LIU,Tieliang JIANG,Lijun PANG,Liangfeng BU

Large Electric Machine and Hydraulic Turbine（2018）

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Abstract

利用数值模拟方法,模拟水泵水轮机不同工况下,导叶出水边的卡门涡现象,揭示导叶下游侧流场涡量分布、导叶出水边附近卡门涡流动状态和流场脱流等.提取监测点速度变化曲线和导叶壁面垂直流向合力变化曲线,通过数据处理,获得水轮机工况和水泵工况,导叶出水边卡门涡频率分别是84.9Hz和53.3Hz.通过对比分析,证明利用经验公式计算得到的卡门涡频率存在较大误差,而数值模拟方法具有较高计算精度.研究结果对水泵水轮机导叶设计、避免发生卡门涡共振问题具有一定指导意义.

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