Airfoil shape for a turbine bucket

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

2005-04-26

2005-04-26

Verdier, Christopher (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

C416S243000, C416SDIG002

Reexamination Certificate

active

06884038

ABSTRACT:
Fourth 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 to 1 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 envelope of ±0.150 inches in directions normal to the surface of the airfoil.

REFERENCES:
patent: 6450770 (2002-09-01), Wang et al.
patent: 6461110 (2002-10-01), By et al.
patent: 6715990 (2004-04-01), Arness et al.
patent: 6722852 (2004-04-01), Wedlake et al.
patent: 6736599 (2004-05-01), Jacks et al.

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