US 6,631,614 B2 · Gas turbine combustor

Abstract

A gas turbine combustor, in which plural pre-mixers that inject fuel into swirling air passages are arranged to surround a pilot burner, and a pilot flame, guided by a pilot cone in the shape of a flaring pipe and provided at the rear end of the pilot burner, is mixed with a pre-mixture blown out from the pre-mixers to obtain a combustion gas, comprising flame-stabilizing means. The flame-stabilizing means lower the disturbance in a region where the pre-mixture and the pilot flame are mixed or stabilize the pilot flame, so that the flame generated by igniting the pre-mixture with the pilot flame is stabilized. By stabilizing the flame, combustion with a leaner air-fuel ratio is possible, and thereby the amount of NOx can be decreased.

Claims8

Dependent claims

A gas turbine combustor for generating combustion gas by igniting a pre-mixture with a pilot flame, comprising:

a pilot nozzle for producing the pilot flame at a rear end of the pilot nozzle;
plural pre-mixers for producing pre-mixture and arranged to surround the pilot nozzle, said plural pre-mixers including swirl air passages and main nozzles for injecting fuel into swirling air generated by said swirl air passages;
a pilot cone arranged at a rear end of the pilot nozzle to guide the pilot flame into the pre-mixture blown out from the pre-mixers so as to mix the pilot flame with the pre-mixture to ignite the pre-mixture and thereby generate combustion gas;
and
a flame-stabilizing means for stabilizing a flame produced by igniting pre-mixture with the pilot flame for generating combustion gas.

2 more elements

Dependencies are inferred from the claim text.

Gas turbine combustor

Life of this patent

Gas turbine combustor

Life of this patent

Abstract

Claims8