离心泵内部流场的数值模拟研究

Numerical simulation on turbulent flow of centrifugal pump

计算流体(CFD)技术已经成功地运用于离心泵内部湍流流动的数值模拟。通过实体建模,为某型号离心泵添加固定导叶,然后运用ANSYS软件,基于标准k-ε模型,对离心泵内部流场进行数值模拟,并对添加导叶前后的压力、速度矢量图以及效率与实际的试验数据进行比较。结果发现,添加固定导叶后,出口压力明显增大,液流流动更加均匀,效率也得到大幅提升,而且与实验结果也比较吻合。研究结果进一步验证了仿真模拟的可靠性,同时也为实体泵优化和进一步提升效率研究提供理论参考。

The Computational Fluid （CFD） technology has been successfully used in the numerical simulation of the turbulent flow of centrifugal pump. In this paper, a numerical simulation model for a centrifugal pump with a added guide vanes is estab- lished, then the simulation for the pump is conducted using ANSYS software based on the standard k - e model, and the pres- sure, velocity vector graph and efficiency before and after adding vanes are compared with test data. The analysis results show that by adding guide vanes, the pressure at outlet increases markedly, fluid flows gets more evenly, and the efficiency is im- proved greatly, and the simulation result agree well with the test results. The results further verify the reliability of the simula- tion, and provide a theoretical reference for the optimization of the centrifugal pump in the future.