Power plants – Combustion products used as motive fluid
Patent
1977-09-20
1979-09-11
Garrett, Robert E.
Power plants
Combustion products used as motive fluid
60 3914R, 60 3928R, F02C 722, F02C 904
Patent
active
041670957
ABSTRACT:
A method of and an apparatus for controlling fuel flow in a one spool type gas turbine with a heat exchanger, particularly applicable during the start-up or acceleration of engine operation. The speed of the gas turbine, temperature at a portion of the gas turbine and compressed air pressure at a portion of the gas turbine are detected as electric signals by sensors. The pressure signal is transmitted to two arithmetic units which perform operations separately to output a starting fuel flow signal Gf.sub.1 and an accelerating fuel flow signal Gf.sub.2, which signals Gf.sub.1 and Gf.sub.2 are alternatively selected by a fuel signal change-over device so that when the speed of the gas turbine is at or above a predetermined value, a reference fuel flow signal Gf corresponding to Gf.sub.1 is transmitted by the change-over device, and when the speed is below the predetermined value, a reference fuel flow signal Gf corresponding to Gf.sub.2 is transmitted by the change-over device. The reference fuel flow signal Gf, after it is compensated by a fuel flow restriction coefficient determined by the temperature signal, is applied to determine fuel flow to the gas turbine by a fuel control actuator. According to this invention, the gas turbine can maintain a fuel flow pattern corresponding to its maximum temperature during the start-up or acceleration of its operation as well as good durability with no particular compensation for changes of atmospheric conditions and gas turbine operation.
REFERENCES:
patent: 3759037 (1973-10-01), Kiscaden
patent: 3793826 (1974-02-01), Holleboom et al.
patent: 3844111 (1974-10-01), Fenton
patent: 3902315 (1975-09-01), Martin
patent: 3938320 (1976-02-01), Nelson
patent: 4044554 (1977-08-01), West
Garrett Robert E.
Toyota Jidosha Kogyo Kabushiki Kaisha
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