基于CFD的离心式水泵流场分析及性能预测

Flow Field Analysis and Performance Prediction of Centrifugal Pump Based on CFD

利用计算流体力学方法对离心式水泵进行数值模拟计算,对内部流体域进行非结构网格划分,并验证了网格无关性问题;采用k-ε湍流模型和Coupled算法,基于Fluent平台开发了离心式水泵的仿真模型,通过仿真计算结果分析了水泵内部流动特征,并预测其性能特性。结果表明,利用计算流体动力学方法能够得到泵内流动特性,预测的扬程、效率和功率的变化趋势符合其性能特性的一般规律,对于水泵产品的研发设计具有重要意义。

Computational fluid dynamics(CFD)method is used to simulate the centrifugal pump in this work.The internal fluid domain is meshed based on unstructured grids.The simulation model of the centrifugal pump is developed in Fluent by using the k-εturbulence model and Coupled algorithm.Characteristics of the fluid flow inside the pump are analyzed.The performance characteristics are predicted.The results show that the real flow characteristics inside the centrifugal pump can be obtained using the three-dimensional CFD numerical simulation.The predicted parameters in terms of the changing trend of lift range,efficiency,and power rate accord with the general laws of the pump’s working characteristics,which is of great significance for the research and development of pump products.