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abstract: six 15¡ãslantways axial-flow pumps are in use at the taipuhe pump station, which provid with specially low head and larger discharge, resulting in the large impeller diameter, the complicated flow field and the more great unsteady hydraulic force on the bearing. this paper analyzes the whole three-dimensional viscous flow from the inlet to the outlet including the impeller, stay vane and the syphon, acquires the flowing properties such as pressure and velocity distribution and the property-curve of the pump, and the vortex distribution and hydraulic loss. in addition, the three-dimensional unsteady flow indeced by the rotor-stator interaction is analyzed. the values of axial thrust and radial thrust against the impeller at different operation conditions provides the bearing design a more exact force boundary condition. more, this study was useful for the inner flow field and force analysis of other slantwise pumps. R`2 d {nr

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