Airfoil shape for a turbine bucket and turbine incorporating same
US7731483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2007 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Feb 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Third 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 and adding the radius of the airfoil base. 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, Y and Z 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 +/−0.0.060 inches in directions normal to the surface of the airfoil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.