Sub-idle stability enhancement and rotating stall recovery

Details Sub-idle stability enhancement and rotating stall recovery Sub-idle stability enhancement and rotating stall recovery

1992-03-30

1993-12-14

Casaregola, Louis J.

Power plants

Reaction motor

Method of operation

60238, 60239, F02K 1115

Patent

active

052691365

ABSTRACT:
In an aircraft gas turbine engine having a variable area exhaust, gas turbine compressor operating conditions are sensed to determine a sub-idle condition or a rotating stall. The exhaust area is increased to a maximum when a sub-idle condition is present. If a condition associated with a rotation stall is sensed, fuel flow is decremented but not below a minimum flow. When the rotating stall ends, fuel flow is restored to the normal level and then the engine reaches stabilized operating conditions, the nozzle area is restored at a scheduled rate.

REFERENCES:
patent: 2516909 (1950-08-01), Redding et al.
patent: 2738644 (1956-03-01), Alford
patent: 2972858 (1961-02-01), Paulick
patent: 3854287 (1974-12-01), Rembold
patent: 4159625 (1979-07-01), Kerr
patent: 4294069 (1981-10-01), Camp

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