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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
The fourth-stage buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I wherein Z is a perpendicular distance from a plane normal to a radius of the turbine centerline and containing the X and Y values with the Z value commencing at zero in the X, Y plane at the radially innermost aerodynamic section of the airfoil and X and Y are coordinate values defining the airfoil profile at each distance Z. The X, Y and Z values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the bucket.
Frost, Wilson (North Muskegon, MI), Stegemiller, Mark Edward (Franklin, OH), Powis, Andrew Charles (Madeira, OH), Pirolla, Peter P. (Greenville, SC), Humanchuk, David John (Simpsonville, SC), Siden, Gunnar Leif (Greenville, SC)
09/ 899,543
July 6, 2001
[0001] This invention was made with Government support under Contract No. DE-FC21-95MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.