| 摘要 |
PROBLEM TO BE SOLVED: To provide an airfoil section for a turbine bucket and a turbine with the same incorporated therein. SOLUTION: Third stage turbine buckets (24) have airfoil section 34 profiles substantially in accordance with Cartesian coordinate values of X, Y and Z' set forth in Table I wherein X and Y values are in inches and the Z' values are non-dimensional values from 0 to 1 convertible to Z distances in inches by multiplying the Z' values by the height of the airfoil section in inches. The X and Y values are distances which, when connected by smooth continuing arcs, define airfoil section profile cross sections at each distance Z. The profile cross sections at each distance Z are joined smoothly to one another to form a complete airfoil section. The X, Y and Z distances may be scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil section cross section for the bucket. The nominal airfoil section given by the X, Y and Z distances lies within an envelope of±0.060 inches in directions vertical to the surface of the airfoil section. COPYRIGHT: (C)2009,JPO&INPIT
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