Bleed modulation for transient engine operation

Details Bleed modulation for transient engine operation Bleed modulation for transient engine operation

1989-04-21

1991-02-12

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Combined with regulation of power output feature

F02C 952

Patent

active

049913891

ABSTRACT:
A gas turbine engine control system modulates a compressor bleed valve between full open and full closed during transient engine operation as a function of the rate of change of compressor speed biased by flight conditions, such as altitude, and corrected for engine power level. A hysteresis construct may be applied to the rate of change of compressor speed before such rate is used to determine the new bleed valve position.

REFERENCES:
patent: 3688504 (1972-09-01), Hutchinson et al.
patent: 4102595 (1978-07-01), Wibbelsman
patent: 4117688 (1978-10-01), Elsaessen et al.
patent: 4655034 (1987-04-01), Kenison et al.
patent: 4756152 (1988-07-01), Krukoski et al.

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