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Shank shape for a turbine blade and turbine incorporating the same

  • US 8,007,245 B2
  • Filed: 11/29/2007
  • Issued: 08/30/2011
  • Est. Priority Date: 11/29/2007
  • Status: Active Grant
First Claim
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1. An article of manufacture including a bucket airfoil, a bucket dovetail to connect the bucket to a turbine wheel and a shank shape to connect the airfoil to the bucket dovetail, said shank having an uncoated nominal profile including a concave, pressure side, substantially in accordance with Cartesian values of X, Y and Z′

  • set forth in Table I wherein the Z′

    values are non-dimensional values in a range from 0 to 1 convertible to Z distances in inches by multiplying the Z′

    values by shank height in inches, and wherein X and Y are distances in inches which, when connected by smooth continuing arcs, define a shank profile section at each distance Z, the profile sections being joined smoothly with one another to form a complete concave, pressure side, shank shape.

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