Abstract
A double-blade centrifugal pump can reduce radial thrust and securing passage particle diameter as compared with Single-blade centrifugal pump, because the impeller is symmetry geometrically. However, many things have not been solved about the radial and axial thrust of a double-blade centrifugal pump. Therefore, to improve pump reliability, it is necessary to quantitatively understand unsteady hydrodynamic force and clarify the behavior and mechanism of the thrust generated. The radial and axial thrust acting on three kinds of double-blade centrifugal pumps having different casing throat area were investigated by numerical analysis in this research. As a result, the effects of the casing throat area that gave the radial and axial thrust were clarified.
