Patent ID: 9458863
Filing Date: 2016-10-04
CPC Classification: F04D

Claim Text:
1. A turbomachine for imparting energy to a multiphase fluid, the multiphase fluid comprising at least a liquid phase and a gaseous phase, the turbomachine comprising: a casing having an inlet and an outlet; an axial stage part comprising at least one axial stage; a mixed-flow stage part comprising at least one mixed-flow stages fluidly connected to the axial stage part; a centrifugal stage part comprising at least one centrifugal stage fluidly connected to the mixed-flow stage part; a shaft connecting the axial stage part, the mixed-flow stage part, and the centrifugal stage part; wherein the at least one axial stage is defined by an angle between an axial impeller outlet flow and an axis parallel to a rotational axis of the shaft having a value between 0° and 5°; the at least one mixed-flow stage is defined by an angle between a mixed-flow impeller outlet flow and the axis parallel to the rotational axis of the shaft having a value between 5° and 80°; and the at least one centrifugal stage is defined by an angle between a centrifugal impeller outlet flow and the axis parallel to the rotational axis of the shaft having a value between 80° and 90°; wherein the angles of the axial, the mixed-flow, and the centrifugal stage part are configured to correlate with Gas-Volume-Fraction (GVF) values of the multiphase fluid, and wherein GVF is a ratio of gaseous phase to liquid phase volume rates of the multiphase fluid.