Airfoil shape for a turbine bucket

Details Airfoil shape for a turbine bucket Airfoil shape for a turbine bucket

2005-04-19

2005-04-19

Lopez, F. Daniel (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Concave surface

C415S223000, C415S189000, C415S189000

Reexamination Certificate

active

06881038

ABSTRACT:
Second stage turbine buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth Table I wherein X and Y values are in inches and the Z values are non-dimensional values, from 0.05 to 0.95 convertible to Z distances in inches by multiplying the Z values by the height of the airfoil in inches. The X and Y values are distances which, when connected by smooth continuing arcs, define airfoil profile sections at each distance Z. The profile sections at each distance Z are joined smoothly to one another to form a complete airfoil shape. The X and Y distances may be scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil section for the bucket. The nominal airfoil given by the X, Y and Z distances lies within an envelop of ±0.160 inches in directions normal to the surface of the airfoil.

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