Power plants – Combustion products used as motive fluid – With variable oxidizer control
Patent
1988-12-14
1990-07-31
Stout, Donald E.
Power plants
Combustion products used as motive fluid
With variable oxidizer control
60 3929, F23R 326
Patent
active
049441493
ABSTRACT:
The control of nitrogen oxides (NOx) is an important feature in the design and operation of gas turbines. It has been found that the production of NOx is affected by the fuel-air ratio within the combustor liner. To this end, an improved combustor liner is proposed which allows the distribution of combustion air and dilution air into the combustion liner in accordance with temperature conditions immediately surrounding the combustor liner. In one embodiment, an apertured ring is rotated in and out of register with dilution air holes in the liner to selectively affect the amount of dilution air and therefore also combustion air into the liner. The ring is driven by a temperature sensitve metals trip wound about the combustor liner. In another embodiment of the invention, the residence time of the combustion reaction is affected by the selection of upstream and or downstream dilution air holes in accordance with the position of the ring holes.
REFERENCES:
patent: 3691761 (1972-09-01), Jackson et al.
patent: 3744242 (1973-07-01), Stettler et al.
patent: 3765171 (1973-10-01), Hagen et al.
patent: 3930368 (1976-01-01), Anderson et al.
patent: 3930369 (1976-01-01), Verdouw
patent: 4899881 (1975-08-01), Arvin et al.
General Electric Company
Stout Donald E.
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