动叶轮叶片数对多相混输泵水力性能的影响

为了探究动叶轮叶片数对多相混输泵外特性、做功性能和水力特性的影响规律，基于欧拉非均质流模型，利用CFX软件对不同动叶轮叶片数下的多相混输泵在多种流量工况、入口含气率10%的条件下进行数值计算。研究发现:流量在90 m3/h及以下时，动叶轮叶片数对扬程和效率的变化趋势影响相对较小，而随着流量的增加，四叶片动叶轮会使混输泵扬程和效率的下降程度增大；当动叶轮叶片数为3时，多相混输泵的外特性、叶片表面静压分布、载荷分布和水力特性等均优于动叶轮叶片数为4时的性能。本文的研究结果可为多相混输泵动叶轮叶片数的选择提供参考。

Effects of the Number of Impeller Blades on Hydraulic Performance in aMultiphase Pump

In order to investigate the effect of impeller blades number on the external characteristics, working and hydraulic performance in a multiphase pump, based on the Eulerian heterogeneous flow model, CFX software was used to carry out numerical calculation of multiphase pump with different number of impeller blades under diverse flow conditions and the inlet gas void fraction was 10%. The present study shows that the impeller blades have a petite effect on the decrease trend of head and efficiency when the flow rate is below 90 m3/h. When the flow rate increases gradually, four impeller blades lead to an increase in the descending gradient of head and efficiency, the external characteristics, static pressure distribution on the blade surface, load distribution and hydraulic characteristics of the multi-phase pump were better when the impeller blades is 3 than 4. The results of the study can provide reference for the selection of the impeller blades of multiphase pump.