TURBINE AIRFOIL WITH VARIABLE AND COMPOUND FILLET
First Claim
1. An airfoil for a gas turbine engine, comprising:
- an arcuate inner band having an inner platform; and
an airfoil body extending outwardly from inner platform, said airfoil body having opposed pressure and suction sidewalls extending between a leading edge and a trailing edge thereof, said airfoil having an inner compound fillet, comprising;
a concave first inner fillet disposed between said airfoil and said inner platform, said first inner fillet having a first radius and extending around the periphery of said airfoil; and
a concave second inner fillet disposed between said airfoil and said inner platform, said second inner fillet extending from said leading edge aftward along said suction sidewall and terminating at a point axially forward of said trailing edge, said second fillet having a second radius greater than said first radius.
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Accused Products
Abstract
A turbine airfoil may be a rotating blade having a single platform, or a stationary nozzle having a pair of platforms. The airfoil body has pressure and suction sidewalls extending between leading and trailing edges. A compound fillet is disposed between the airfoil body and at least one of the platforms. The compound fillet includes a concave first fillet having a first radius, and a concave second fillet having a second, greater radius. The second fillet extends from the leading edge downstream along the suction sidewall and terminates at a point upstream of the trailing edge. The second fillet may also extend downstream from the leading edge along the pressure sidewall.
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Citations
17 Claims
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1. An airfoil for a gas turbine engine, comprising:
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an arcuate inner band having an inner platform; and
an airfoil body extending outwardly from inner platform, said airfoil body having opposed pressure and suction sidewalls extending between a leading edge and a trailing edge thereof, said airfoil having an inner compound fillet, comprising;
a concave first inner fillet disposed between said airfoil and said inner platform, said first inner fillet having a first radius and extending around the periphery of said airfoil; and
a concave second inner fillet disposed between said airfoil and said inner platform, said second inner fillet extending from said leading edge aftward along said suction sidewall and terminating at a point axially forward of said trailing edge, said second fillet having a second radius greater than said first radius. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A turbine nozzle segment, comprising:
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an arcuate outer band having an outer platform;
an arcuate inner band having an inner platform; and
an airfoil disposed between said inner and outer bands, said airfoil having opposed pressure and suction sidewalls extending between a leading edge and a trailing edge thereof, said airfoil having an outer compound fillet, comprising;
a concave first outer fillet disposed between said airfoil and said outer platform, said first outer fillet having a first radius; and
a concave second outer fillet disposed between said airfoil and said outer platform, said second outer fillet extending from said leading edge downstream along said suction sidewall and terminating at a point upstream of said trailing edge, said second outer fillet having a second radius greater than said first radius. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification