水轮机导水部件流场的研究

Research on Guide Component Flow Fields of Hydraulic Turbines

采用数值分析与模型实验相结合的方法,对水轮机导水部件双列环列叶栅流场进行了分析研究。表明采用边界元法对水轮机双列环列叶栅流场进行预估与筛选是行之有效的。建立了水轮机固定导叶与活动导叶相对安放位置的关系式。得到了在清水和含沙水条件下两种活动导叶与固定导叶的最佳相对安放位置和流场的不同特性。

The flow field of double-row annular cascades of hydraulic turbines is studied by means of digital analysis in combination with model tests. It shows that the boundary element method is an effective means for preliminary evaluation and selective comparison of diverse design. A formula for fixing the relative positioning of guide vanes and buckets in hydraulic turbines is presented. Optimum guide vane and bucket positioning with flow field characterris-ics both for clean and sandy water are obtained.