Airfoil trailing edge cooling arrangement
US4601638A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1984 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Dec 21, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D5/186
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A turbine airfoil for high temperature applications has a spanwise trailing edge slot and a cut back pressure side wall. The pressure side wall has a thickness t at its downstream end. The slot is divided into channels which discharge a film of cooling air over the exposed back surface of the suction side wall downstream of the cut back pressure side wall. Each channel tapers from a throat at its upstream end (which meters the flow of cooling air) to the slot outlet of width s. The airfoil is designed with a ratio t/s of no more than 0.7 which significantly improves cooling of the trailing edge, reduces required cooling air flow, and permits greater cut back distances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.