Internal core profile for the airfoil of a turbine bucket

Details Internal core profile for the airfoil of a turbine bucket Internal core profile for the airfoil of a turbine bucket

2005-05-17

2005-05-17

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

With diversely oriented inlet or additional inlet for...

C416S095000, C416S09600A, C416S22300B, C416SDIG002

Reexamination Certificate

active

06893210

ABSTRACT:
First stage turbine buckets have internal core 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 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 internal core profile sections at each distance Z. The profile sections at each distance Z are joined smoothly to one another to form a complete internal core profile. 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 internal core profile. The nominal internal core profile given by the X, Y and Z distances lies within an envelope of ±0.050 inches in directions normal to any internal core surface location.

REFERENCES:
patent: 5980209 (1999-11-01), Barry et al.
patent: 6722851 (2004-04-01), Brittingham et al.

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