TURBO FAN ENGINE OF CORE ENGINE SEPARATION TYPE

摘要

PROBLEM TO BE SOLVED: To provide a silent turbo fan engine of a core engine separation type allowing reduction of noise generated by a control propelling device by using high pressure air as working fluid of a turbine for driving a control fan for controlling a body attitude. SOLUTION: The control fan 17 constituting the control propelling device 4 disposed for controlling the body attitude of the turbo fan engine 1 of the core engine separation type is driven by an air turbine 19 using as the working fluid the high pressure air compressed by a compressor 6 of the core engine 2 and supplied through a duct 10. Speed of the working fluid discharged from the control fan 17 and the air turbine 19 is lower than that of the working fluid discharged from the propelling device 3 for propelling, and is as low as that required for attitude control, so that the noise occurring from the control propelling device 4 is reduced. COPYRIGHT: (C)2003,JPO