ULTRA HIGH OVERALL PRESSURE RATIO GAS TURBINE ENGINE

摘要

A gas turbine engine comprises a first turbine rotor positioned upstream of a second intermediate turbine rotor and a third turbine rotor positioned downstream of the first and second turbine rotors. A fan rotor and three compressor rotors, with an upstream one of the compressor rotors are connected to rotate on a shaft with a fan drive turbine and a reduced speed fan rotor through a gear reduction. A second intermediate compressor rotor for being driven by the second intermediate turbine rotor, and a third compressor rotor downstream of the first and second compressor rotors and for being driven by the first turbine rotor.