System for operating gas turbine jet engine with fan damage

Details System for operating gas turbine jet engine with fan damage System for operating gas turbine jet engine with fan damage

1990-07-17

1991-12-17

Casaregola, Louis J.

Power plants

Reaction motor

Condition responsive thrust varying means

36443102, F02K 118

Patent

active

050725807

ABSTRACT:
Normal high load operation automatically varies nozzle area to maintain an optimum engine pressure ratio (EPR). An error signal representing fan damage is established by comparing the actual EPR to the predicted EPR. Compressor stalls are also monitored. In response to these signals a minimum nozzle area is set and modified. Automatic operation to hold EPR and afterburning is inhibited. Further signals representing satisfactory operation may reset the inhibiting action.

REFERENCES:
patent: 4139887 (1979-02-01), Levesque
patent: 4159625 (1979-07-01), Kerr
patent: 4294069 (1981-10-01), Camp
patent: 4467600 (1984-08-01), Peikert
patent: 4581889 (1986-04-01), Carpenter et al.

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