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中文摘要：
为评估网格类型及网格收敛性对离心泵数值模拟精度的影响，对一台离心泵模型分别进行结构、非结构及混合网格划分，并对不同类型的网格进行三维定常全流场数值模拟，结合Richardson外推法判断数值解的收敛性，对比分析不同网格类型的离心泵内部流场情况．结果表明：随着网格单元数的增加，GCI变小，且当网格单元数相近时，结构化网格的GCI远小于非结构网格与混合网格；3种不同网格类型下的叶轮内部流动有着不同程度的差异，结构化网格能够得到更多的漩涡；混合网格在蜗壳出口处存在较大的低速区，且在扩散段的截面处能够捕捉到更多的二次涡现象．
英文摘要：
To evaluate the effects of mesh generation techniques and grid convergence on pump perfor- mance, three widely used mesh styles of structured hexahedral, unstructured tetrahedral and hybrid prismatic/tetrahedral meshes were generated for a centrifugal pump model. The quantitative grid convergence was assessed based on a grid convergence index （GCI） to deduce the degree of grid refinement. The results show that the GCI-value becomes smaller with the increasing of grid cell number, and the GCI-value for structured meshes calculated is lower than those for unstructured and hybrid meshes. The structured meshes have more vortexes in impeller passage. Nevertheless, the hybrid meshes have larger low-velocity area at outlet and more secondary vortexes at a specified location than those of structured meshes and unstructured meshes.
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Multi-condition optimization and experimental measurements of a double-blade centrifugal pump impell
Influence of the empirical coefficients of cavitation model on predicting cavitating flow in centrif
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