Method of cooling a gas turbine blade and apparatus therefor

Details Method of cooling a gas turbine blade and apparatus therefor Method of cooling a gas turbine blade and apparatus therefor

1978-11-29

1982-07-13

Garrett, Robert E.

Power plants

Combustion products used as motive fluid

60 3953, 60728, 415114, 416 96R, 416 97R, F02C 718

Patent

active

043387802

ABSTRACT:
Part of high-pressure air is extracted from the vicinity of the final stage of a compressor and is introduced into a water spraying chamber, and water at the normal temperature is injected into the high-pressure air from a nozzle installed in the water spraying chamber, to prepare a cooled coolant. The coolant sometimes contains water drops. The cooled coolant is fed into coolant passageways which are provided inside a moving blade in a manner to extend from the root part to the tip of the moving blade. When the coolant passes through the passageways, the moving blade is cooled by the coolant, and after the cooling, the coolant is emitted into a turbine main gas passageway. In case where the water drops are contained in the coolant, they vaporize during the cooling of the moving blade, to cool the air of the coolant, to suppress the temperature rise of the coolant and to enhance the cooling effect.

REFERENCES:
patent: 2654220 (1953-10-01), Boestad et al.
patent: 3280555 (1966-10-01), Charpentier et al.
patent: 3446481 (1969-05-01), Kydd
patent: 3849025 (1974-11-01), Grondahl
patent: 3856433 (1974-12-01), Grondahl et al.
patent: 3936227 (1976-02-01), Wojclk
patent: 3949549 (1976-04-01), Holl
"Hot Turbines", Flight, Mar. 16, 1956, p. 293.

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