Ultra-efficient propulsor with an augmentor fan circumscribing a turbofan
US8689538B2 · kind B2 · utility
76Cited by
13References
51Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 9, 2009 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Nov 24, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An ultra-efficient “green” aircraft propulsor utilizing an augmentor fan is disclosed. A balanced design is provided combining a fuel efficient and low-noise high bypass ratio augmentor fan and a low-noise shrouded high bypass ratio turbofan. Three mass flow streams are utilized to reduce propulsor specific fuel consumption and increase performance relative to conventional turbofans. Methods are provided for optimization of fuel efficiency, power, and noise by varying mass flow ratios of the three mass flow streams. Methods are also provided for integration of external propellers into turbofan machinery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.