| 摘要 |
PROBLEM TO BE SOLVED: To provide an airfoil profile of a second stage turbine bucket. SOLUTION: A second stage bucket (22) has an airfoil profile (23) substantially in accordance with Cartesian coordinate values of X, Y and Z described in Table I, wherein X, Y and Z values are expressed in inches. Z denotes the distance expressed in inch from and perpendicular to a plane passing through the center line of an engine. Values X and Y denote distances expressed in inches which define airfoil profile sections at each distance Z when the values of the distances are connected by a smooth continuous arc. The profile sections at the distance Z are smoothly coupled with each other to form a complete airfoil shape. The distances X and Y, and optionally the distance Z can be extended or contracted as a function of the same constant or number to obtain the extended or contracted airfoil section of a bucket. A reference airfoil given by the distances X, Y and Z lies within an envelope of±0.016 inch. COPYRIGHT: (C)2005,JPO&NCIPI
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