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US 7,220,100 B2Granted
Crescentic ramp turbine stage
AssigneeGeneral Electric Company
InventorsChing-Pang Lee, Anna Tam, Kevin Richard Kirtley, Scott Henry Lamson
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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 includes a crescentic ramp increasing in height from the leading and trailing edges toward the midchord of the airfoil along the pressure side thereof.
Claims24
A low pressure turbine stage comprising:
- a row of solid airfoils integrally joined to corresponding platforms and spaced circumferentially apart to define respective flow passages therebetween for channeling combustion gases;
- each of said airfoils including a concave pressure side and a circumferentially opposite convex suction side extending axially in chord between opposite leading and trailing edges;
- and
- each of said platforms including a crescentic ramp adjoining said pressure sides thereof along a corresponding fillet extending between said leading and trailing edges, and said ramps are convex axially along said fillets and increase in height from said leading and trailing edges to a crest of maximum height near the midchord of said airfoils.
1 more element
A turbine stage comprising:
- a row of airfoils integrally joined to corresponding platforms and spaced circumferentially apart to define respective flow passages therebetween for channeling gases;
- each of said airfoils including a concave pressure side and a circumferentially opposite convex suction side extending in chord between opposite leading and trailing edges;
- and
- each of said platforms including a crescentic ramp increasing in height from said leading and trailing edges toward the midchord of said airfoil along said pressure side thereof.
1 more element
Dependencies are inferred from the claim text.