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Turbofan exhaust nozzle and Method for reducing noise in a turbofan engine having a turbofan exhaust nozzle.
Turbofan exhaust nozzle and Method for reducing noise in a turbofan engine having a turbofan exhaust nozzle.
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机译:涡轮风扇排气喷嘴和用于降低具有涡轮风扇排气喷嘴的涡轮风扇发动机中的噪声的方法。
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摘要
A turbofan exhaust nozzle includes a fan duct defined between a fan nacelle and core engine cowling. The duct includes an arcuate outlet at the trailing edge of the nacelle. A movable flap is disposed in a minor portion of the fan duct, with a remaining major portion of the fan duct having a constant flow area. The flap may be moved between stowed and deployed positions to locally decrease flow area inside the duct for noise attenuation.
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