叶轮与导叶体之间的距离对混流泵水阻系数及效率的影响

摘要

以某混流泵为对象,基于FLUENT软件,建立相对坐标系下的时均连续方程及N-S方程,并采用RNG k-ε模型、非结构四面体网格和SIMPLEC算法对该混流泵内部三维流动进行数值模拟.在分析网格无关性的基础上,并在叶轮与导叶体之间不同距离的情况下分别模拟了其在静态时的水阻系数和在动态时的性能参数,结果表明:在特殊环境下,当混流泵的叶轮与导叶体之间的距离为0.45 b2时水阻系数最低、效率最高,可达到静态低阻、动态高效的性能要求.%Using a kind of mixed-flow pump as the object of the study, the time — averaged continuity equation with relative coordinates and the N-S equation is established on the basis of FLUENT software,And using standard k-e equation with turbulence model, unstructured tetrahedral network and SIMPLE algorithm to make numerical simulation. The study has done on the basis of the irrelevance of grid number, under different distance between impeller and guide vane ,taking the water resistance coefficient simulation when it is static and the performance parameter simulation when it is rotary, the results shows that : under special environment , the mixed-flow pump can obtain lower water resistance coefficient and high efficiency when the distance between impeller and guide vane is 0.45 b2 and can fulfill the required of low water resistance coefficient and high efficiency.