Turbine blade with enhanced cooling and profile optimization
First Claim
1. An airfoil for a turbine blade having an uncoated profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I carried only to three decimal places wherein Z is a distance from a platform on which the airfoil is mounted and X and Y are coordinates defining the profile at each distance Z from the platform.
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Accused Products
Abstract
A first-stage turbine blade includes an airfoil having a profile according to Table I. The airfoil has a plurality of cooling air passages extending linearly from the root portion to the tip portion of the airfoil. The blade includes a shank having a pair of cavities in communication through the blade dovetail with a plenum in the wheel space for supplying cooling air to the passages in the airfoil. The cooling passages in the airfoil terminate in a recess at the tip portion which has an opening adjacent the trailing edge of the airfoil and along the suction side to enable egress of cooling air into the hot gas stream on the low pressure side of the airfoil. The majority of the cooling passages are turbulated. Certain of those passages are arranged in rows lying adjacent to the pressure and suction sides of the airfoil.
244 Citations
28 Claims
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1. An airfoil for a turbine blade having an uncoated profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I carried only to three decimal places wherein Z is a distance from a platform on which the airfoil is mounted and X and Y are coordinates defining the profile at each distance Z from the platform.
- 2. An airfoil for a turbine blade having an uncoated profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I carried only to three decimal places wherein Z is a distance from a platform on which the airfoil is mounted and X and Y are coordinates defining the profile at each distance Z from the platform, said airfoil including a camber angle as set forth in the chart of FIG. 11B with the camber angle and the radius being carried only to three decimal points.
- 14. An airfoil for a turbine blade having an uncoated profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I carried only to three decimal places wherein Z is a distance from a platform on which the airfoil is mounted and X and Y are coordinates defining the profile at each distance Z from the platform, said airfoil including a stagger angle as set forth in the chart of FIG. 9B with the stagger angle and radius being carried only to three decimal places.
- 20. An airfoil for a turbine blade having an uncoated profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I carried only to three decimal places wherein Z is a distance from a platform on which the airfoil is mounted and X and Y are coordinates defining the profile at each distance Z from the platform, said airfoil including a throat as set forth in the chart of FIG. 10B with the throat distance and radius being carried only to three decimal places.
- 26. A cast turbine airfoil having a camber and a plurality of cooling passages extending from a root portion to a tip portion thereof, said passages including first and second rows thereof on opposite sides of said camber and lying adjacent suction and pressure sides of said airfoil, respectively, said airfoil including a turbine blade having an uncoated profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I carried only to three decimal places wherein Z is a distance from a platform on which the airfoil is mounted and X and Y are coordinates defining the profile at each distance Z from the platform.
Specification