Turbomachine with mixed-flow stage and method
AssigneeNuovo Pignone S.p.A.
InventorsLorenzo BERGAMINI, Vittorio Michelassi
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Abstract
In one embodiment, a turbomachine for imparting energy to a multiphase fluid is provided. The turbomachine comprises 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 stage fluidly connected to the axial stage part; and a centrifugal stage part comprising at least one centrifugal stage fluidly connected to the mixed-flow stage part. The 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 mixed-flow stage by an angle having a value between 5° and 80°, and the centrifugal stage by an angle having a value between 80° and 90°.
Claims10
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 and configured to receive the multiphase fluid via the inlet and to compress the gaseous phase of the multiphase liquid:
- a mixed-flow stage part comprising at least one mixed-flow stage 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 and configured to output the multiphase fluid through the outlet:
- and
- a shaft connecting the axial stage part, the mixed-flow stage part and the centrifugal stage part,
- wherein the 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 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 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°.
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 and configured to receive the multiphase fluid via the inlet and to compress the gaseous phase of the multiphase liquid;
- a mixed-flow stage part comprising at least one mixed-flow stage fluidly connected to the axial stage part and configured to output the multiphase fluid at the outlet;
- and
- a shaft connecting the axial stage part and the mixed-flow stage part,
- wherein the 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°, and
- the 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°.
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;
- a mixed-flow stage part comprising at least one mixed-flow stage fluidly connected to the inlet;
- a centrifugal stage part comprising at least one centrifugal stage fluidly connected to the mixed-flow stage part and configured to output the multiphase fluid through the outlet;
- and
- a shaft connecting the mixed-flow stage part and the centrifugal stage part,
- wherein the mixed-flow stage is defined by an angle between a mixed-flow impeller outlet flow and an axis parallel to a rotational axis of the shaft having a value between 5° and 80°, and
- the 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°.
A method for imparting energy to a multiphase fluid, the multiphase fluid comprising at least a liquid phase and a gaseous phase, the method comprising:
- fluidly connecting an axial stage part to a mixed-flow stage part and to a centrifugal stage part in this order;
- providing the axial stage part, the mixed-flow stage part and the centrifugal stage part into a casing having an inlet and an outlet;
- and
- connecting an axial impeller of the axial stage part, a mixed-flow impeller of the mixed-flow stage part, and a centrifugal impeller of the centrifugal stage part to a shaft,
- wherein the 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 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 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°.
Dependencies are inferred from the claim text.