CFD在大型潜水贯流泵装置选型设计中的应用

Application of CFD in the selection and design of large submersible axial-flow pump systems

为分析在不同工况下泵装置内部流态和叶轮的水力特性,预测泵装置整体水力性能,以大闸河排洪泵站大型贯流泵装置为研究对象,建立泵装置的进水流道、泵段(叶轮和导叶)和出水流道的整体水力模型,采用SST k-ω湍流模型进行CFD数值模拟计算。结果表明,在设计要求运行范围内泵装置内部流线平顺,流态稳定,压力分布均匀,整体水力性能良好,水力模型及水泵参数均能够满足泵站设计要求,研究方法可为泵站工程的水泵选型设计提供借鉴。

To analyze the internal flow patterns and hydraulic characteristics of the impeller under different operating conditions and to predict the overall hydraulic performance of the pump system,a study was conducted on the large axial-flow pump system of the Dazha River flood discharge pump station.A comprehensive hydraulic model was established for the pump system,including the inlet flow passage,pump section(impeller and guide vane),and outlet flow passage.CFD numerical simulations were carried out using the SST k-ωturbulence model.The results indicated that within the design operating range,the flow inside the pump device was smooth,the flow pattern was stable,the pressure distribution was uniform,and the overall hydraulic performance was good.The hydraulic model and pump parameters met the pump station design requirements,and the research method could serve as a reference for pump selection and design in pump station engineering.