| 摘要 |
PROBLEM TO BE SOLVED: To provide a second stage turbine bucket airfoil profile capable of achieving an optimized aerodynamic and mechanical bucket load as well as optimized aerodynamic efficiency. SOLUTION: A second stage bucket 22 has an airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z shown in Table 1. In Table 1, the values X and Y are in inches, and the Z value is non-dimensional along the bucket centerline coincident with a turbine radius and convertible to a Z distance in inches from the turbine axis by multiplying the Z value by the height of the airfoil and adding the root radius to the result. 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 reference airfoil given by the X, Y and Z distances lies within an envelop of±4.064 mm (0.160 inches). COPYRIGHT: (C)2004,JPO
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