Blunt tip turbine blade
First Claim
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1. A turbine airfoil comprising:
- laterally opposite pressure and suction sidewalls extending in chord between opposite leading and trailing edges and in span from a root to an outer tip cap bridging said sidewalls at distal ends thereof;
a concave flute extending chordally in the external surface of said pressure sidewall and below said tip cap; and
said pressure sidewall joins said tip cap at an internal convex bend conformably backing said concave flute, and said suction sidewall joins said tip cap at an internal fillet, and both said bend and fillet are disposed below said tip cap.
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Abstract
A turbine airfoil includes opposite pressure and suction sidewalls, and extends in chord between opposite leading and trailing edges and in span from a root to an outer tip cap. The tip cap bridges the sidewalls, and a flute extends chordally along the pressure sidewall and below the tip cap.
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Citations
25 Claims
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1. A turbine airfoil comprising:
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laterally opposite pressure and suction sidewalls extending in chord between opposite leading and trailing edges and in span from a root to an outer tip cap bridging said sidewalls at distal ends thereof; a concave flute extending chordally in the external surface of said pressure sidewall and below said tip cap; and said pressure sidewall joins said tip cap at an internal convex bend conformably backing said concave flute, and said suction sidewall joins said tip cap at an internal fillet, and both said bend and fillet are disposed below said tip cap. - View Dependent Claims (2, 3)
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4. A turbine airfoil comprising:
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laterally opposite pressure and suction sidewalls extending in chord between opposite leading and trailing edges and in span from a root to an outer tip cap bridging said sidewalls at distal ends thereof and bounding an internal cooling circuit; a flute extending chordally in the external surface of said pressure sidewall and below said tip cap; said pressure sidewall joins said tip cap at an internal bend backing said flute, and said suction sidewall joins said tip cap at an internal fillet, and both said bend and fillet are disposed below said tip cap; a row of film cooling holes extending from said cooling circuit and through said bend into said flute; and said tip cap includes a first external corner adjoining said pressure sidewall above said flute and said first corner is aligned coplanar with said external surface of said pressure sidewall below said flute, and a second external corner adjoining said suction sidewall, and said bend is disposed behind said first corner, and said fillet is disposed behind said second corner. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A turbine blade comprising:
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a hollow airfoil integrally joined at a root to a platform and dovetail; said airfoil including laterally opposite pressure and suction sidewalls and extending in chord between opposite leading and trailing edges and in span from said root to an outer blunt tip cap bridging said sidewalls at squared external corners therewith; and a flute extending chordally in the external surface of said pressure sidewall and spaced below said corner thereat. - View Dependent Claims (12)
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13. A turbine blade comprising:
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a hollow airfoil integrally joined at a root to a platform and dovetail; said airfoil including laterally opposite pressure and suction sidewalls and extending in chord between opposite leading and trailing edges and in span from said root to an outer tip cap bridging said sidewalls at distal ends thereof; a flute commencing in said pressure sidewall behind said leading edge and extending chordally in the external surface of said pressure sidewall toward said trailing edge and below said tip cap; and said pressure sidewall joins said tip cap at an internal bend concentrically backing said flute, and said suction sidewall joins said tip cap at an internal fillet, and both said bend and fillet are disposed below said tip cap. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification