Control of aircraft bleed air stage mixing

Details Control of aircraft bleed air stage mixing Control of aircraft bleed air stage mixing

1991-04-01

1992-11-10

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 3907, F02C 700

Patent

active

051613646

ABSTRACT:
A gas turbine engine bleed air system in which air flow from a high pressure and a low pressure compressor stage of a gas turbine engine are mixed together by controlling the pressure at the outlet of a proportional valve. The pressure is controlled by modulating the flow area of the proportional valve through which the high pressure air flows in order to achieve a scheduled pressure value. The scheduled pressure value is determined as a function of a temperature error at a location downstream of the proportional valve in the bleed air system.

REFERENCES:
patent: 3446425 (1969-05-01), Cleeves
patent: 3487993 (1970-01-01), Rannenberg
patent: 3981466 (1976-09-01), Shah
patent: 4285466 (1981-08-01), Linscheid et al.
patent: 4482114 (1984-11-01), Gupta et al.
patent: 4550561 (1985-11-01), Coffinberry
patent: 4775117 (1988-10-01), Standke
patent: 5063963 (1991-11-01), Smith

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