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High efficiency last stage bucket for steam turbine

  • US 7,997,873 B2
  • Filed: 03/27/2009
  • Issued: 08/16/2011
  • Est. Priority Date: 03/27/2009
  • Status: Active Grant
First Claim
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1. A turbine bucket including a bucket airfoil having an airfoil shape, said airfoil comprising a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z and arc coordinate R set forth in Tables 1-19 wherein the X, Y, Z and R distances are in inches, the X and Y coordinate values being smoothly joined by an arc of radius R defining airfoil profile sections at each distance Z, the profile sections at the Z distances being joined smoothly with one another to form a complete airfoil shape.

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