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US 7,134,842 B2Granted
Scalloped surface turbine stage
AssigneeGeneral Electric Company
InventorsAnna Tam, Ching-Pang Lee, Kevin Richard Kirtley, Ronald Scott Bunker, Scott Henry Lamson, Scott Michael Carson
Life of this patent
Estimating the term…
Abstract
A turbine stage includes a row of airfoils joined to corresponding platforms to define flow passages therebetween. Each airfoil includes opposite pressure and suction sides and extends in chord between opposite leading and trailing edges. Each platform has a scalloped flow surface including a bulge adjoining the pressure side adjacent the leading edge, and a bowl adjoining the suction side aft of the leading edge.
Claims28
A turbine stage comprising:
- a row of airfoils integrally joined to corresponding platforms and spaced laterally apart to define respective flow passages therebetween for channeling gases;
- each of said airfoils including a concave pressure side and a laterally opposite convex suction side extending in chord between opposite leading and trailing edges;
- each of said platforms having a scalloped flow surface including a bulge adjoining said pressure side adjacent said leading edge, and a bowl adjoining said suction side aft of said leading edge;
- and
- said bulge and bowl commence forward of said leading edges and form laterally therebetween an arcuate channel extending axially along said platform between adjacent airfoils.
2 more elements
A turbine stage comprising:
- a row of airfoils integrally joined to corresponding platforms and spaced laterally apart to define respective flow passages therebetween for channeling gases;
- each of said airfoils including a concave pressure side and a laterally opposite convex suction side extending in chord between opposite leading and trailing edges;
- and
- each of said platforms having a scalloped flow surface including a bulge adjoining said pressure side adjacent said leading edge, and a bowl adjoining said suction side aft of said leading edge and centered aft of said bulge.
1 more element
A turbine blade comprising:
- an airfoil integrally joined to a platform, and having laterally opposite pressure and suction sides extending in chord between axially opposite leading and trailing edges;
- and
- said platform including a bulge adjoining said pressure side adjacent said leading edge, a first bowl portion adjoining said suction side aft of said leading edge, and a second bowl portion integrally formed with said bulge on said pressure side and being complementary with said first bowl portion to define therewith on an adjacent blade a collective bowl.
Dependencies are inferred from the claim text.