Turbine blade platform with near-wall cooling
First Claim
1. A turbine rotor blade comprising:
- a platform having an outer surface forming a hot gas flow path and an inner surface separating the hot gas flow path from a box rim cavity;
an airfoil extending from the platform;
the airfoil having a pressure side wall and a suction side wall;
the platform having a pressure side edge and a suction side edge, and a forward edge and an aft edge;
a plurality of curved cooling channels on the pressure side of the platform covering the pressure side platform from the pressure side edge to the pressure side wall of the airfoil; and
,some of the pressure side cooling channels having a wider middle section than other of the pressure side curved cooling channels so that substantially the entire pressure side platform is covered by the pressure side cooling channels.
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Accused Products
Abstract
A turbine blade having a platform and an airfoil extending from the platform. The platform includes a plurality of pressure side cooling channels formed within the platform and extending from a location along the aft edge of the platform. Each cooling channel includes a supply hole connected to the box rim cavity formed below the platform. Each pressure side cooling channel opens into a diffuser positioned along the pressure side edge of the platform to discharge cooling air onto the suction side platform of an adjacent blade. The suction side of the platform has cooling channels with supply holes connected to the box rim cavity and discharge holes positioned along the aft edge of the platform. The pressure side and suction side cooling channels in the platform have a curvature substantially of the same curvature as the airfoil in order to cool the entire platform surface exposed to the hot gas flow.
71 Citations
20 Claims
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1. A turbine rotor blade comprising:
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a platform having an outer surface forming a hot gas flow path and an inner surface separating the hot gas flow path from a box rim cavity; an airfoil extending from the platform; the airfoil having a pressure side wall and a suction side wall; the platform having a pressure side edge and a suction side edge, and a forward edge and an aft edge; a plurality of curved cooling channels on the pressure side of the platform covering the pressure side platform from the pressure side edge to the pressure side wall of the airfoil; and
,some of the pressure side cooling channels having a wider middle section than other of the pressure side curved cooling channels so that substantially the entire pressure side platform is covered by the pressure side cooling channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A turbine rotor blade comprising:
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a platform having an outer surface forming a hot gas flow path and an inner surface separating the hot gas flow path from a box rim cavity; an airfoil extending from the platform; the airfoil having a pressure side wall and a suction side wall; the platform having a pressure side edge and a suction side edge, and a forward edge and an aft edge; a plurality of curved cooling channels on the pressure side of the platform; the plurality of pressure side curved cooling channels being separated by walls extending a length of the channel; and
,a plurality of openings in each wall to fluidly connect adjacent cooling channels. - View Dependent Claims (13, 14, 15)
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16. A turbine rotor blade comprising:
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a platform having an outer surface forming a hot gas flow path and an inner surface separating the hot gas flow path from a box rim cavity; an airfoil extending from the platform; the airfoil having a pressure side wall and a suction side wall; the platform having a pressure side edge and a suction side edge, and a forward edge and an aft edge; a plurality of curved cooling channels in the pressure side of the platform; each pressure side curved cooling channel having an inlet near to the forward edge of the platform and an outlet opening onto the platform at the pressure side edge; a plurality of curved suction side cooling channels in the suction side of the platform; each suction side curved cooling channel having an inlet near to the forward edge of the platform and an outlet opening on a side of the aft edge of the platform; and
,the curved cooling channels covering substantially the entire platform surface. - View Dependent Claims (17, 18, 19, 20)
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Specification