Gas turbine airfoil with a cooling air regulating seal

Details Gas turbine airfoil with a cooling air regulating seal Gas turbine airfoil with a cooling air regulating seal

1994-09-30

1996-04-30

Look, Edward K.

Rotary kinetic fluid motors or pumps

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

416 96A, 416 97R, F01D 902, F01D 518

Patent

active

055119379

ABSTRACT:
A gas turbine vane airfoil has an aft cavity in which an insert is placed so as to form a cooling air passage between the insert and the walls that form the cavity. The insert serves to distribute cooling air around the passage. Cooling air from the passage exits the vane airfoil via film cooling holes in the pressure surface of the airfoil and via a passage formed in the trailing edge of the airfoil. A W-shaped flexible regulator seal is attached to the trailing edge of the insert and has legs that are pressed against ridges in the airfoil walls. Holes in the regulating seal regulate the amount of cooling air flowing from the passage surrounding the insert to the trailing edge passage, thereby preventing too low a pressure differential between the cooling air in the passage surrounding the insert and the hot compressed gas flowing over the airfoil, which would inhibit adequate film cooling.

REFERENCES:
patent: 3767322 (1973-10-01), Durgin et al.
patent: 4252501 (1981-02-01), Peill
patent: 4292008 (1981-09-01), Grosjean et al.
patent: 4312624 (1982-01-01), Steinbauer, Jr. et al.
patent: 4437810 (1984-03-01), Pearce
patent: 4526512 (1985-07-01), Hook
patent: 4930980 (1990-06-01), North et al.
patent: 4962640 (1990-10-01), Tobery
patent: 5145315 (1992-09-01), North et al.

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