Combined turbine stator cooling and turbine tip clearance contro

Details Combined turbine stator cooling and turbine tip clearance contro Combined turbine stator cooling and turbine tip clearance contro

1990-11-13

1991-09-17

Casaregola, Louis J.

Power plants

Reaction motor

Interrelated reaction motors

60 3975, 415116, F02C 718

Patent

active

050482882

ABSTRACT:
The outer air seal of a gas turbine engine is continuously cooled by compressor discharge air (primary) and a by-pass line (secondary) which can be throttled or shut off, augments cooling during high power conditions and is throttled or shut off at reduced power conditions, allowing the casing scrubbed by fan discharged air to shrink and reduce the clearance of the tips of the turbine blades. The air from the continuous flow (primary) line is routed to the outer air seals in a manner to avoid scrubbing the engine case.

REFERENCES:
patent: 3742705 (1973-07-01), Sifford
patent: 3975901 (1976-08-01), Hallinger et al.
patent: 4069662 (1978-01-01), Redinger, Jr. et al.
patent: 4304093 (1981-12-01), Schulze
patent: 4317646 (1982-03-01), Steel et al.
patent: 4487016 (1984-12-01), Schwarz et al.
patent: 4596116 (1986-06-01), Mandet et al.
patent: 4683716 (1987-08-01), Wright et al.

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