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US 10,883,387 B2Granted
Gas turbine exhaust diffuser with air injection
AssigneeGeneral Electric Company
InventorsHua Zhang, Laxmikant Merchant, Bradly Aaron Kippel, Valery Ivanovich Ponyavin
Life of this patent
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Abstract
A gas turbine system includes an exhaust processing system that may process exhaust gas generated by a gas turbine engine, the exhaust processing system includes an exhaust diffuser that may receive the exhaust gas from a turbine of the gas turbine engine and having an annular passage disposed between an inner annular wall and an outer annular wall, and an air injection assembly disposed within the exhaust diffuser. The air injection assembly includes one or more air injection conduits disposed within the annular passage of the exhaust diffuser and including fluid injection holes that may direct a cooling fluid into a first mixing region of the exhaust diffuser.
Claims19
A gas turbine system, comprising:
- an exhaust processing system configured to process exhaust gas generated by a gas turbine engine, the exhaust processing system comprising an exhaust diffuser configured to receive the exhaust gas from a turbine of the gas turbine engine and having an annular passage disposed between an outer annular wall and an inner wall defined by a center body;
- one or more struts extending radially between the inner wall and the outer annular wall, wherein each strut of the one or more struts is symmetric about a respective centerline axis of the strut;
- a fluid injection assembly disposed within the exhaust diffuser, wherein the fluid injection assembly comprises one or more fluid injection conduits disposed within the annular passage of the exhaust diffuser and comprising fluid injection holes configured to direct a fluid into a first mixing region of the exhaust diffuser, wherein at least one fluid injection conduit of the one or more fluid injection conduits extends radially between the inner wall and the outer annular wall and a respective cross-section of the at least one fluid injection conduit is symmetric about an axially extending plane of the at least one fluid injection conduit, wherein each of the one or more fluid injection conduits is coupled to a downstream portion of a respective strut of the one or more struts, wherein the fluid injection assembly comprises a central hub coupled to the one or more fluid injection conduits and disposed on a downstream end of the center body of the exhaust diffuser, wherein a diameter of the central hub decreases in a direction away from the downstream end of the center body such that the central hub has a convex outer surface, and wherein the central hub comprises a central fluid injection hole disposed on the apex of the convex outer surface of the central hub, the central fluid injection hole being oriented to inject fluid along a downstream direction of the exhaust diffuser, wherein the central fluid injection hole is fluidly coupled to at least one of the one or more fluid injection conduits, wherein each of the one or more fluid injection conduits comprises a first side abutting a respective strut of the one or more struts, and wherein each of the one or more fluid injection conduits decreases in width from the first side in the downstream direction.
An exhaust diffuser, comprising:
- a center body extending at least a portion of a length of the exhaust diffuser;
- an outer annular wall circumferentially surrounding an inner wall defined by the center body to define an annular passage, wherein the annular passage is configured to receive an exhaust gas from a turbine of a gas turbine engine;
- a plurality of support struts extending from the inner wall to the outer annular wall, wherein each support strut of the plurality of support struts is symmetric about a respective centerline axis of the support strut;
- and
- a fluid injection assembly comprising a plurality of fluid injection conduits, wherein at least one fluid injection conduit of the plurality of fluid injection conduits extends radially between the inner wall and the outer annular wall and a respective cross-section of the at least one fluid injection conduit is symmetric about an axially extending plane of the at least one fluid injection conduit, wherein each fluid injection conduit of the plurality of fluid injection conduits is coupled to a downstream portion of one of the plurality of support struts, wherein each fluid injection conduit of the plurality of fluid injection conduits comprises one or more fluid injection holes configured to supply a fluid into a region of the exhaust diffuser downstream from the respective one of the plurality of support struts, wherein each fluid injection conduit of the plurality of fluid injection conduits comprises a first side abutting a respective support strut of the plurality of support struts, and wherein each fluid injection conduit of the plurality of fluid injection conduits decreases in width from the first side in a downstream direction.
2 more elements
A system, comprising:
- an exhaust diffuser, comprising:
- a center body comprising a first wall extending about a central axis;
- an exhaust passage disposed circumferentially about the first wall;
- a second wall disposed circumferentially about the exhaust passage;
- a plurality of hollow struts extending radially between the first and second walls, wherein each of the plurality of hollow struts is a cylindrical hollow strut;
- and
- a plurality of fluid injection conduits, wherein each of the plurality of fluid injection conduits is coupled to a downstream portion of a respective one of the plurality of hollow struts, and each of the plurality of fluid injection conduits comprises a plurality of fluid injection holes, and wherein each of the plurality of fluid injection conduits comprises a first side abutting a respective strut of the plurality of hollow struts, and wherein each of the plurality of fluid injection conduits decreases in width from the first side in a downstream direction.
4 more elements
Dependencies are inferred from the claim text.