초록 ▼

A high bypass ratio turbofan engine having a fan section, a booster compressor disposed aft of the fan section relative to the flow of combustion gases through the engine, and a core section disposed aft of the booster compressor. A low pressure counterrotating turbine, disposed aft of the core sect

A high bypass ratio turbofan engine having a fan section, a booster compressor disposed aft of the fan section relative to the flow of combustion gases through the engine, and a core section disposed aft of the booster compressor. A low pressure counterrotating turbine, disposed aft of the core section, is used for driving the fan section and the booster compressor. The counterrotating turbine includes at least one set of rotating turbine blades and at least one set of oppositely rotating counterrotating turbine blades. A twin spool shaft is provided for coupling the turbine blades to the booster compressor and for coupling the counterrotating turbine blades to the fan section. A reduction gear is disposed in the drive shaft for coupling the turbine blades to the fan section and for reducing the rotational speed of the turbine output power to match the rotational speed of the fan section thereby splitting the usable work of the turbine blades between the fan section and the booster.

대표청구항 ▼

A high bypass ratio turbofan engine, comprising: a fan section; a booster compressor disposed aft of said fan section relative to the flow of combustion gases through the engine; a core section disposed aft of said booster compressor; turbine means, disposed aft of said core section, for driving sai

A high bypass ratio turbofan engine, comprising: a fan section; a booster compressor disposed aft of said fan section relative to the flow of combustion gases through the engine; a core section disposed aft of said booster compressor; turbine means, disposed aft of said core section, for driving said fan section and said booster compressor, said turbine means comprising a counterrotating turbine having at least one set of rotatable first turbine blades and at least one set of oppositely rotatable counterrotating turbine blades; outer shaft means for coupling said first turbine blades to said booster compressor; inner shaft means for coupling said counterrotating turbine blades to said fan section; and reduction gear means for coupling said outer shaft means to said fan section and for reducing the rotational speed thereof to match the rotational speed and direction of said fan section thereby splitting the usable work of said first turbine blades between said fan section and said booster compressor.