Apparatus and methods for flowing a cooling or purge medium in a turbine downstream of a turbine seal
US6412270B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2001 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Sep 12, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/601
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Leakage flows through seals are used to cool components of a turbine downstream of the seals. At certain seal locations, the leakage flows are restricted to the extent that cooling of downstream components cannot be effected by the leakage flows. The cooling air leakage flow is augmented by extracting bleed air from different stages at different temperatures from a compressor and combining the extracted flows in an ejector to provide a flow having a temperature intermediate the temperatures of the extracted flow streams for augmenting the leakage flow to cool the component. The ejector thus uses high extraction air to entrain lower temperature extraction air to lower the ejector exit air temperature, reducing the magnitude of air required to cool the downstream component and enhancing the effectiveness of the advanced seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.