中文摘要：

以北赵引黄工程谢村站用多级双吸式离心泵为研究对象,基于雷诺时均的N-S方程,采用SSTk-ε湍流模型,压力速度耦合使用SIMPLEC计算,对泵内部流动进行了三维定常全流场湍流数值模拟,得到不同工况下该泵内部流动的速度矢量图等流场信息,在对其内部流动规律进行了定性分析的基础上,预测了泵的性能,并与现场测试结果进行了对比分析。分析结果表明,首级叶轮首级压水室以及次级叶轮次级压水室内流动较均匀;由于过渡流道的结构特点以及流动惯性,流体在首级压水室进入过渡流道时,在流道突然扩大区域形成了旋涡,旋涡区域大小与流量有关;预测扬程值与现场测试扬程吻合较好,预测扬程最大误差为2.7%,而预测的流量-水力效率曲线与现场测试流量-机组效率曲线变化趋势一致;水泵内部流动的数值模拟可为工程中泵设计阶段的性能预测和结构优化提供依据。

英文摘要：

Based on the Reynolds-averaged equations closed by SST k-ε turbulent model and the SIMPLEC algorithm,the 3D turbulent flow within multi-stage double-Suction centrifugal pump was simulated at Xiecun pump station in Beizhao Yellow River diversion project.And the velocity vectors of different operation were obtained.The inner flow was qualitatively analyzed and the performance was predicted.The predicted performance was compared with the field test data.The results show that the flow pattern in the first-stage impeller-chamber and secondary impeller-volute are uniform.Because of structural characteristics and flow inertia,vortex region is found in transition passage region of abrupt expansion.And the size of vortex region is related with flow rate.The predicted head is similar compared with field test data,and maximum prediction error is 2.7%.The variation trends of capacity-hydraulic efficiency curve and capacity-unit efficiency curve are consistent.The flow numerical simulation within pump can provide the basis for the performance prediction and optimization on engineering design phase.