Gas turbine combustor

Details Gas turbine combustor Gas turbine combustor

2005-05-10

2005-05-10

Casaregola, Louis J. (Department: 3746)

Power plants

Combustion products used as motive fluid

Plural combustion products generators in ring coaxial with...

C060S737000

Reexamination Certificate

active

06889495

ABSTRACT:
The present invention provides a gas turbine combustor which makes it possible to achieve both a high combustion efficiency and low NOx emissions characteristics over a wide output power range without using a device that can vary the flow rate of the air used for combustion, by burning a lean mixture using high-temperature burned gas. The gas turbine combustor10comprises pre-mixture injection tubes16which conduct a mixture of fuel and air into a combustion chamber11. The mixture from the pre-mixture injection tubes16is injected toward burned gas19apresent on the downstream side of the flame19, which is injected from burners15that open into the combustion chamber11, and this mixture is mixed with the burned gas19a. Even in a mixture which is leaner than the lower limit of inflammability, the radicals in the burned gas19aare effective in initiating reactions, so that the combustion of the mixture can be started. Since the burned gas has a lower oxygen concentration than fresh mixture, and since the pre-mixture is dispersed in space, the generation of NOx can be suppressed.

REFERENCES:
patent: 3792582 (1974-02-01), Markowski
patent: 5274993 (1994-01-01), Keller
patent: 5323614 (1994-06-01), Tsukahara
patent: 8-42851 (1996-02-01), None

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