General Electric Company

Ge Infrastructure Technology, LLC

Wei Zhao

Ronnie Ray Pentecost

Jayaprakash Natarajan

Seth Reynolds Hoffman

Jonathan Dwight Berry

Richard Martin DiCintio

Thomas Edward Johnson

Michael John Hughes

Jun Cai

Shivakumar Srinivasan

Andrew Grady Godfrey

Sravan Kumar Dheeraj Kapilavai

Wessam Sherif Estefanos

Richard Martin Dicintio

An axial fuel stage (AFS) injector includes a mixing member including a plurality of axially elongated mixing chambers therebetween. Inlets of the mixing chambers are axially wavy. A high-pressure (HP) air injection member defines a set of HP air jets spaced from the axially wavy inlet of each axially elongated mixing chamber. A fuel plenum in the mixing member delivers fuel from a fuel source to a set of fuel injectors in each mixing chamber. Each set of HP air jets is configured to direct an HP air from an HP air source and, optionally, to draw a low-pressure (LP) air from an LP air source to direct the LP air with the HP air and the fuel into the axially wavy inlet of a respective axially elongated mixing chamber. The axially elongated mixing chambers direct the air-fuel mixture into the combustion liner for combustion in a secondary combustion zone thereof.

Axial fuel stage injector with axially elongated mixing chambers with axially wavy inlets

A fuel injection assembly for a combustor of a gas turbine engine includes a body with a head section that defines an air intake chamber. A mixing chamber is disposed below the air intake chamber. A deflection member is disposed in the air intake chamber and includes an upper deflection surface and sides spaced apart from inner wall surfaces of the air intake chamber such that peripheral air passages are defined for air to pass from the air intake chamber into the mixing chamber. A plurality of radially extending and longitudinally spaced-apart ribs is disposed along longitudinal side walls of the mixing chamber. A fuel plenum is disposed along the longitudinal side walls of the mixing chamber, and a plurality of fuel injection holes is defined from the fuel plenum through the longitudinal side walls of the mixing chamber and at least some of the ribs.

Fuel injection assembly for a combustor

Fuel injection assemblies and combustors are provided. A fuel injection assembly includes a boss that forms at least a portion of an annular wall. The annular wall defines a mixing channel that extends along a center axis. The fuel injection assembly further includes a fuel injector that has a radially outer wall and a radially inner wall that at least partially defines a fuel plenum. The fuel injector further includes a plurality of premix tubes that each extend along an injection axis from an inlet end on the radially outer wall through the fuel plenum to an outlet end, and wherein the injection axis is slanted towards the center axis of the mixing channel.

A fluid mixing apparatus includes mixing conduits that extend through a fluid plenum and that define injection holes therethrough. The fluid plenum, which surrounds a first wall defining a main passage fluidly coupled to a low-pressure fluid source, is surrounded itself by a second wall defining a high-pressure plenum fluidly coupled to a high-pressure fluid source. The mixing conduits fluidly couple the high-pressure plenum to the main passage, and the fluid from the fluid plenum is delivered with the high-pressure fluid to the main passage, where the fluids mix before being discharged from an outlet of the main passage. The fluid mixing apparatus may be used to mix one or more fuels with high- and low-pressure air in a gas turbine combustor. Alternately, the fluid mixing apparatus may mix a fluid with high- and low-pressure water streams.

Fluid mixing apparatus using high- and low-pressure fluid streams

A fuel injector is provided for the radial introduction of a fuel/air mixture to a combustor. The fuel injector includes a frame having interior sides defining an opening for passage of a first fluid; at least one fuel injection body; and a conduit fitting. The at least one fuel injection body is coupled to the frame and positioned within the opening, thereby defining flow paths for the first fluid. The at least one fuel injection body defines a fuel plenum, and a set of fuel injection holes are defined through an outer surface of the at least one fuel injection body. The conduit fitting is coupled to the frame and conveys fuel from a fuel supply line to the fuel plenum. Fuel and the first fluid mix in the flow paths and are delivered through the outlet to the combustor.

Fuel injectors and methods of use in gas turbine combustor

A fuel injector for a gas turbine combustor includes side wall fuel injection bodies extending between opposite end walls. Each side wall fuel injection body defines a fuel plenum and includes an outer surface defining fuel injection ports in communication with the fuel plenum. One or more fuel injection bodies extending between the end walls are positioned between the side wall fuel injection bodies. Each fuel injection body defines a fuel plenum and includes an outer surface defining fuel injection ports in fluid communication with the fuel plenum. A conduit fitting coupled to the frame is fluidly connected to the respective fuel plenums. The fuel injection ports fluidly communicate with air flow paths defined between the fuel injection bodies and the side wall fuel injection bodies. A combustor for a gas turbine includes a liner and an axial fuel staging system with the present fuel injector.

Premixing fuel injectors and methods of use in gas turbine combustor

An axial fuel staging injector for a gas turbine includes a body. The body includes an upstream end and a downstream end. The body defines a primary compressed air flow path through which compressed air flows from a compressed air source to a transition duct of a gas turbine combustor. The body includes a plurality of outlets disposed on an interior surface thereof. Each outlet of the plurality of outlets includes a secondary fuel conduit in fluid communication with a secondary fuel source, and includes a first wall that defines a secondary fuel path. The secondary compressed air conduit is in fluid communication with a compressed air source, and includes a second wall disposed about the first wall in a substantially coannular arrangement, wherein the first wall and the second wall define a secondary compressed air flow path. Each outlet is configured to inject a secondary fuel and compressed air into the primary compressed air flow path in a direction transverse to the primary compressed air flow path forming a fuel-air mixture.

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Greer, SC, United States of America

Wei Zhao