초록 ▼

An annular combustor system is disclosed in use with a radial turbine-type gas turbine gas generator, the system having an annular housing defining a single stage combustor, an external fuel/air premixer system having a mixing chamber and a fuel valve under the control of a controller, to provide a

An annular combustor system is disclosed in use with a radial turbine-type gas turbine gas generator, the system having an annular housing defining a single stage combustor, an external fuel/air premixer system having a mixing chamber and a fuel valve under the control of a controller, to provide a preselected lean fuel/air ratio mixture for introduction to the combustion zone of the annular housing. A separate compressed air valve under the control of the controller can optionally be included. Compressed air conduits are used to channel a portion of the total compressed air flow to the premixer and the remainder to the dilution zone of the combustor, and a fuel conduit is used to deliver all of the fuel to the premixer. Convection cooling of the annular housing is accomplished using compressed air without diluting the fuel air ratio in the combustion zone. The premixer includes a venturi, and a fuel nozzle for spraying fuel into the venturi inlet along the venturi axis, the venturi axis being aligned substantially tangentially to the annular housing axis to provide a swirling admission of the fully premixed fuel/air mixture to the combustion zone. The venturi can include a flow-smoothing member and be heated to provide augmented vaporization of liquid fuels. The compressed air valve can be integrated with the premixer housing.

대표청구항 ▼

A combustor system for operation with a source of compressed air and a source of fuel, the combustor system comprising: a cylindrical housing defining a single stage combustion chamber, said housing having an axis; at least one fuel/air premixer disposed outside said cylindrical housing; a first con

A combustor system for operation with a source of compressed air and a source of fuel, the combustor system comprising: a cylindrical housing defining a single stage combustion chamber, said housing having an axis; at least one fuel/air premixer disposed outside said cylindrical housing; a first conduit interconnecting the source of compressed air and said premixer; a second conduit interconnecting the fuel supply and said premixer; and a fuel valve for determining the fuel flow rate to said premixer through said second conduit, wherein said premixer includes a venturi having an inlet, an outlet, and a flow axis, said venturi inlet being disposed to receive the compressed air and fuel, and said outlet being flow connected to said cylindrical housing to deliver a substantially mixed fuel/air mixture to said combustion chamber, said venturi being disposed with said flow axis being aligned in a substantially tangential direction with respect to said housing axis, and wherein said premixer further includes an air valve operatively connected to control the compressed air flow to said venturi inlet.