Variable pitch turbofan engine and a method for operating same
US3946554A · kind A · utility
40Cited by
3References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Sep 6, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Variable geometry guide vanes are provided in a variable pitch turbofan assembly. A method is disclosed for reducing aerodynamically induced stresses in the variable pitch fan blades as the blades are changed between the forward and reverse pitch modes. The guide vane geometry is scheduled to change in a manner to control the flow into and out of the fan blades in order to establish a favorable aerodynamic environment during the transition between the forward and the reverse pitch modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.