小型混流式水泵水轮机水力设计

采用二元理论结合螺旋势流设计了混流式水泵水轮机, 并利用Pro / ENGINEER 建立三维几何模型。通过对 不同曲率导叶的CFD 数值模拟计算, 分别得到水泵工况和水轮机工况下的流场流线图、速度图以及压力图, 证实标 准导叶更适用于混流可逆式机组。效率估算结果显示, 机组效率在水轮机工况达到85%, 水泵工况达到88%, 说明 设计方法可行。 The mix ed2flow Francis pump t ur bine w as designed accor ding t o the dualistic theor y and spir al potential f low , and Pro / ENGINEER so ftwar e was used to build the t hr ee2dimensional g eometric model. Based on the CFD numerical simulations o n the g uide v anes w ith different curv at ur es, the flow pathlines, flow v elocit ies, and pressure distr ibutions under the w ater pump and turbine wo rking conditio ns w ere o btained. The results sug gested that the standar d g uide vanes ar e mo re suitable fo r the Francis pump turbine. T he efficiency calculat ion results show ed that t he turbine unit eff iciency can r each 85% under the turbine wo rking conditio ns and 88% under the w ater pump w o rking conditio ns, which indicated that the desig n met ho d is feasible.