Cooled turbine vane

Details Cooled turbine vane Cooled turbine vane

1989-02-15

1990-06-05

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

With passage in blade, vane, shaft or rotary distributor...

415116, F01D 518

Patent

active

049309803

ABSTRACT:
A cooled turbine vane in a multistage gas turbine is cooled with a fluid and a major portion of the fluid is dissipated into the gas flow path. A minor portion is supplied to a seal housing and seal for cooling the seal housing and for providing sufficiently cool fluid to the seal. The vane has a hollow airfoil body fixedly attached to the seal housing via an inner shroud and to a blade ring via an outer shroud. An inlet inot the hollow interior of the airfoil body through the outer shroud is in flow communication with a source of coolant fluid. An outlet in the inner shroud is in flow communication with the seal and its housing. Ports in the airfoil body extending from its hollow interior are in flow communication with the gas flow path. In a preferred cooled turbine vane, the coolant fluid in the airfoil body flows through return bends with reduced stagnant zons and flow resistance for increasing the heat transfer across the surfaces of the airfoil body around the bends and for reducing the pressure drop in the bend areas. A bend at the inner shroud is adjacent the outlet and a bend adjacent the outer shroud is adjacent a port for flowing the coolant fluid out of the stagnant zones in the bends.

REFERENCES:
patent: 3369792 (1968-02-01), Kraimer et al.
patent: 3799696 (1974-03-01), Redman
patent: 3945758 (1976-03-01), Lee
patent: 4416585 (1983-11-01), Abdel-Messeh
patent: 4462754 (1984-07-01), Schofield
patent: 4666368 (1987-05-01), Hook, Jr. et al.
patent: 4684322 (1987-08-01), Clifford et al.

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