中文摘要：

针对复杂模型生成的非结构网格质量差、计算难收敛问题,以一低比转数离心泵为例对其进行整体结构化网格划分,将结构与非结构两种不同类型网格导入CFX软件,进行多个工况点下的流场模拟。分析表明,结构化网格收敛速度快、收敛精度高,得到压力云图分布更为均匀,压力更接近设计值,小叶片绕流区分离涡更明显。模拟计算结果与试验数值的对比验证了结构化网格模拟计算值的可行性和准确性。

英文摘要：

Aimed at some complex CFD models which may generate very poor grid by using unstructured grid,and is bound to increase the difficulty of calculating,numerical simulation of a low specific-speed centrifugal pump was carried out between the unstructured grid and structured grid at the different operating points in CFX software.The results of simulation show that the pressure distributions of structured grid model is closer to the design value and separated vortex is more obvious near short blade surface region.Compared the simulation results with the experimental values,it is found that the result of structured grid can meet the design requirement.That confirms the numerical simulation computation is feasible with accuracy.