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US 2013/0156583 A1Published application
Airfoils including tip profile for noise reduction and method for fabricating same
AssigneeGeneral Electric Company
InventorTrevor Howard Wood
Life of this patent
Estimating the term…
Abstract
An airfoil, a fan assembly and an unducted contra-rotating fan engine include fabricating at least one airfoil including a suction and a pressure side coupled together at a leading and a trailing edge and extending therebetween. The airfoil includes a plurality of chord sections having a chord length. The airfoil including a tip profile defining a reducing slope extending from the leading edge at the tip portion along at least a portion of the chord length. The tip profile is configured to reduce the high unsteady pressure near the tip portion of the airfoil.
Claims29
An airfoil comprising:
- a root portion and a tip portion, wherein the tip portion is configured extending radially outward from the root portion;
- a suction side and a pressure side coupled together at a leading edge and a trailing edge spaced chord-wise and downstream from the leading edge;
- a plurality of chord sections having a chord length and extending in a chord-wise direction between the leading edge and the trailing edge of the airfoil and spaced apart along a length of the airfoil in a span-wise direction between the root portion and the tip portion;
- and
- a tip profile defining a reducing slope extending from the leading edge at the tip portion along at least a portion of the chord length,
- wherein the tip profile is configured to reduce high unsteady pressure near the tip portion of the airfoil.
3 more elements
A fan assembly comprising:
- a disk;
- and
- a plurality of fan blades coupled to the disk, each blade of the plurality of fan blades comprising:
- an airfoil comprising a root portion, a tip portion, a suction side and a pressure side coupled together at a leading edge and at a trailing edge spaced chord-wise and downstream from the leading edge;
- a plurality of chord sections having a chord length and extending in a chord-wise direction between the leading edge and the trailing edge of the airfoil and spaced apart along a length of the airfoil in a span-wise direction between the root portion and the tip portion;
- and
- a tip profile defining a reducing slope extending from the leading edge at the tip portion along at least a portion of the chord length,
- wherein the tip profile is configured to reduce high unsteady pressure near the tip portion of the airfoil.
5 more elements
An unducted contra-rotating fan engine comprising:
- an unducted fan section including a first fan blade row and a second fan blade row axially spaced aftward from the first fan blade row, the second fan blade row including a plurality of airfoils, each airfoil comprising:
- a root portion and a tip portion, wherein the tip portion is configured extending radially outward from the root portion;
- a suction side and a pressure side coupled together at a leading edge and a trailing edge spaced chord-wise and downstream from the leading edge;
- a plurality of chord sections having a chord length and extending in a chord-wise direction between the leading edge and the trailing edge of the airfoil and spaced apart along a length of the airfoil in a span-wise direction between the root portion and the tip portion;
- and
- a tip profile defining a reducing slope extending from the leading edge at the tip portion along at least a portion of the chord length,
- wherein the tip profile is configured to reduce high unsteady pressure near the tip portion of the airfoil.
4 more elements
A method of fabricating an airfoil, said method comprising:
- fabricating at least one airfoil including a root portion, a tip portion, a suction side and a pressure side coupled together at a leading edge and a trailing edge spaced chord-wise and downstream from the leading edge;
- wherein the airfoil includes a plurality of chord sections having a chord length and extending in a chord-wise direction between the leading edge and the trailing edge of the airfoil and spaced apart along a length of the airfoil in a span-wise direction between the root portion and the tip portion, said tip portion comprises:
- a tip profile defining a reducing slope extending from the leading edge at the tip portion along at least a portion of the chord length,
- wherein the tip profile is configured to reduce high unsteady pressure near the tip portion of the airfoil.
1 more element
Dependencies are inferred from the claim text.