| 摘要 |
An annular combustor system is disclosed in use with a radial turbine-type gas turbine engine module, the system having an annular housing defining a single stage combustor, an external fuel/air premixer system having a mixing chamber and a compressed air valve and a fuel valve both 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. 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, a fuel nozzle for spraying fuel into the venturi inlet along the venturi axis, and a premixer housing integrating the compressed air valve, the venturi axis being aligned substantially tangentially to the annular housing axis to provide a swirling admission of the premixed fuel/air mixture to the combustion zone.
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