%A WANG Dangxiong, CAO Weidong, ZHANG Yining, LIU Xiaojuan, MA Jinxingª¤ %T Effects of volute cross-section shape and impeller position on volute type axial flow pump performance %0 Journal Article %D 2016 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.15.0030 %P 105-109 %V 34 %N 2 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_2005.shtml} %8 2016-02-25 %X In view of this situation that the study on the volute type axial flow pump volute design optimization, the external features and internal flow field distribution is less, the 3D flow in the volute type axial flow pump was numerically simulated by using ANSYS CFX 14.5 software, based on Reynolds-averaged equations closed by the standard k-¦Å model. Three kinds of new volutes combined with impellers were simulated. The head and efficiency at the design flow rate are the lowest in case of horseshoe-section volute. The 3D flow numerical simulation between the impeller at 4 different axial positions and the volute in terms of relatively higher hydraulic efficiency was carried out. The results show that when the exit of the impeller and the volute inlet middle plane are 40 mm apart, axial flow pump efficiency is the highest. When the impeller exit and the volute inlet middle plane are 80 mm apart, axial flow pump efficiency is the lowest. In this case, between the impeller and volute and in the volute exist substantial reflux and whirlpool. The relative position of axial flow impeller and volute have ob-viously affects the flow-head curve and the flow-efficiency curve.ª¤