基于CFD的离心泵三维内流场的数值模拟

为了研究离心泵内部流场的流动规律,基于CFD技术,应用雷诺时均N-S方程与标准k-ε湍流模型对不同工况下二级离心泵内部的三维湍流流动进行了数值模拟,并对其内部的流动状态进行了分析,得到了离心泵内部流场的压力分布规律。结果表明:随着出口流量不断增大,泵的整体压力逐渐减小,各级叶轮的压力逐渐减小,叶轮的速度值逐渐增大。在相同条件下,离心泵进口到出口的压力逐渐增大,各级叶轮中的静压值径向逐渐增大,且次级叶轮的压力值比首级叶轮的压力值大。

CFD Numerical Simulation of Three-Dimensional Inner Flow Field of Centrifugal Pump

In order to study the flow law of the internal flow field of centrifugal pump,based on CFD technology,the Reynolds time-averaged NS equation and the standard k-ε turbulence model are used to numerically simulate the three-dimensional turbulent flow inside the two-stage centrifugal pump under different working conditions.The internal flow state was analyzed,and the pressure distribution of the internal flow field of the centrifugal pump were obtained.The results show that as the outlet flow rate increases,the overall pressure of the pump gradually decreases,the pressure of the impellers at each level gradually decreases,and the speed value of the impeller gradually increases.Under the same conditions,the pressure from the inlet to the outlet of the centrifugal pump gradually increases,and the static pressure value in the impellers of each stage gradually increases gradually,and the pressure value of the secondary impeller is larger than the pressure value of the first stage impeller.