非结构网格离心泵全流场数值模拟研究
Numerical Simulation of Centrifugal Pump Flow Field Based on Unstructured Meshes

相对于传统的理论和实验方法,采用数值模拟的方法能够更快捷地获得离心泵的内部流场分布。研究了离心泵全流场数值求解的方法,构建了离心泵的几何模型并划分非结构网格,采用了CFX软件,通过求解雷诺平均N-S方程,对离心泵流场进行了数值模拟,计算得到了离心泵在不同工况下的扬程和效率。将计算值与实验值进行了对比,在设计工况点Q的条件下,扬程相对误差为2.8%,效率值相对误差为1.8%。因此,针对离心泵建立的基于非结构网格的离心泵全流场数值求解方法是可靠的,能够快速准确的对离心泵进行性能预测与分析。
Comparing with conventional theoretical and experimental approaches, the numerical simulation method is faster to obtain the inside flow field distribution of centrifugal pumps. This can be used as references in centrifugal pump design. Thus, the numerical method on flow field in centrifugal pump was explored in this article. Geometry model was built and unstructured meshes were generated. Numerical simulation was adopted by solving the Reynolds Average Navier-Stokes (RANS) equation with CFX software. Total head and efficiency of centrifugal pump under different working conditions were calculated. The simulation results and measured data were compared; the relative error of total head is 2.8% while the error of efficiency is 1.8% at designed working point Q. Thus, the numerical method for whole flow field of centrifugal pump built in this article is reliable; it can predict and analyze the performance of centrifugal pumps rapidly and accurately