Integrated counterrotating turbofan

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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F01D 5/14 (2006.01) F02C 3/067 (2006.01) F02C 3/073 (2006.01)

Patent

CA 2548361

A turbofan engine (10) includes a fan (14), compressor (18), combustor (20), single-stage high pressure turbine (22), and low pressure turbine (24) joined in serial flow communication. First stage rotor blades (58) in the low pressure turbine (24) are oriented oppositely to the rotor blades (46) in the high pressure turbine (22) for counterrotation. First stage stator vanes (52) in the low pressure turbine (24) have camber and twist for carrying swirl directly between the rotor blades (46,58) of the high and low pressure turbines (22,24).

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