High bypass-ratio turbofan jet engine

Details High bypass-ratio turbofan jet engine High bypass-ratio turbofan jet engine

2011-04-12

2011-04-12

Casaregola, Louis (Department: 3741)

Power plants

Reaction motor

Interrelated reaction motors

C060S262000

Reexamination Certificate

active

07921637

ABSTRACT:
To provide a turbofan jet engine which is capable of increasing the bypass ratio without increasing the fan diameter, and of reducing air resistance acting on the engine, a front fan duct that discharges air compressed by a front fan to the atmosphere and an aft fan duct that introduces air into an aft fan are disposed such as to change cross-sectional shapes thereof by rotating around a core engine in a counterclockwise direction, so that the cross-sectional geometric relationship between the front fan duct and the aft fan duct at a position immediately posterior to the front fan and a cross-sectional geometric relationship between the front fan duct and the aft fan duct at a position immediately anterior to the aft fan are inverted.

REFERENCES:
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patent: 5058379 (1991-10-01), Lardellier
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patent: 6351940 (2002-03-01), Guinan et al.
patent: 2005/0178890 (2005-08-01), Bacon
patent: 2008/0075580 (2008-03-01), Yanagi et al.
European Search Report dated Jun. 8, 2010, issued in corresponding European Patent Application No. 09153344.8.

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