Gas turbine engine geometry control

Details Gas turbine engine geometry control Gas turbine engine geometry control

1975-06-23

1976-09-21

Gordon, Clarence R.

Power plants

Combustion products used as motive fluid

60 392, 60 3925, 415149R, F02C 902

Patent

active

039811409

ABSTRACT:
A single-shaft gas turbine engine suited for road vehicle propulsion has variable inlet and outlet guide vanes in the compressor of the engine and a variable turbine nozzle. These variable features are called engine variable goemetry (EVG). In normal operation, the areas of the flow paths at the inlet and outlet of the compressor and of the turbine nozzle are varied with desired power level to suit varying air flow through the engine. An actuator increases the areas in response to a request for increased power output.
In a braking mode, the compressor variable geometry is decoupled from the actuator and remains at a minimum flow condition while the turbine nozzle is opened as the power request decreases below a particular low value. The opening of the turbine nozzle decreases the engine power output, thus increasing its capacity to absorb power from the vehicle. Logic circuits control the coupling and decoupling of the compressor variable geometry.

REFERENCES:
patent: 2715814 (1955-08-01), Barr
patent: 3025668 (1962-03-01), Mock
patent: 3066488 (1962-12-01), Mock
patent: 3138923 (1964-06-01), Kronogard
patent: 3255586 (1966-06-01), Hennig
patent: 3625003 (1971-12-01), Liddle
patent: 3782108 (1974-01-01), Holste
patent: 3795104 (1974-03-01), McLean
patent: 3899886 (1975-08-01), Swick

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