Turbine blade with near-wall multi-metering and diffusion cooling circuit
US7625180B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2006 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | May 31, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4932
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A turbine airfoil with a near wall cooling design that reduces the airfoil main body metal temperature and reduces the cooling flow requirement for increased turbine efficiency. The airfoil includes a main body portion with internal cooling air supply cavities separated by one or more ribs, and a plurality of impingement cells formed on the outer surface on the pressure side and suction side of the airfoil main body. The impingement cells with film cooling holes are formed by placing a filler material within the cells and partially formed film cooling holes extending from the side wall of the cell. A thin outer airfoil wall is formed over the main body with the filler material filled cells. The filler material is leached out from the airfoil, leaving the impingement cells with the film cooling hole extending out from the side and covered by the thin outer airfoil wall. The airfoil is thus formed with a thin outer wall and the film cooling holes are formed within the outer wall without machining. The film cooling holes can be formed as straight holes, diffusion holes, or metering and diffusions holes. Also, the metering and diffusion hole connecting the cooling supply cavity to the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.