Turbine airfoil curved squealer tip with tip shelf

Details Turbine airfoil curved squealer tip with tip shelf Turbine airfoil curved squealer tip with tip shelf

2007-10-16

2007-10-16

Edgar, Richard A. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

With fluid passage in working member communicating with...

Discharge solely at periphery normal to rotation axis

C416S228000, C415S173100

Reexamination Certificate

active

11162434

ABSTRACT:
An airfoil for a gas turbine engine includes a root, a tip, a leading edge, a trailing edge, and opposed pressure and suction sidewalls extending generally along a radial axis. The airfoil includes a tip cap extending between the pressure and suction sidewalls; and spaced-apart suction-side and pressure-side tip walls extending radially outward from the tip cap to define a tip cavity therebetween. The pressure-side tip wall includes a continuously concave curved arcuate portion, at least a section of which extends circumferentially outward from a radial axis of the airfoil. At least a portion of the pressure-side tip wall is recessed from the pressure sidewall to define an outwardly facing tip shelf, such that the pressure-side tip wall and the tip shelf define a trough therebetween.

REFERENCES:
patent: 5282721 (1994-02-01), Kildea
patent: 6672829 (2004-01-01), Cherry et al.
patent: 6790005 (2004-09-01), Lee et al.

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