Two-shaft gas turbine engine

Details Two-shaft gas turbine engine Two-shaft gas turbine engine

1980-03-28

1983-01-18

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Different fluids

60 3416R, F02C 310, F02C 726

Patent

active

043686168

ABSTRACT:
To shorten the time length of a start phase of the operation of a two-shaft gas turbine engine, closed-loop control of the rate of fuel feed is performed based on the magnitude of deviation of actual rate of rotation of the gas generator shaft from a target value during a time period shortly after starting of the engine, until actual speed of the power turbine sufficiently nears a target value, and then the basis of closed-loop control is switched over to the magnitude of deviation of actual speed of the power turbine from the target value. This method is practised by appropriately presetting the target value of the rotation rate of the gas generator shaft and by continuously making a comparison between the aforementioned two deviations and always selecting the smaller one of the two for use it as a feedback signal to produce a fuel feed rate control signal.

REFERENCES:
patent: 3606754 (1971-09-01), White
patent: 4010605 (1977-03-01), Uram
patent: 4040250 (1977-08-01), Saunders et al.
patent: 4276743 (1981-07-01), LaGrone

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