초록 ▼

A quiet nacelle system for jet aircraft engines includes a nose cowl and nose dome having a sound-attenuating liner, a concentric ring between the nose cowl and nose dome, and fan duct components having a sound-attenuating liner. The system is particularly suitable for JT3D-3B and JT3D-7 engines for

A quiet nacelle system for jet aircraft engines includes a nose cowl and nose dome having a sound-attenuating liner, a concentric ring between the nose cowl and nose dome, and fan duct components having a sound-attenuating liner. The system is particularly suitable for JT3D-3B and JT3D-7 engines for use with DC-8 aircraft. The components may be combined as a hush kit for retrofit in existing nacelle systems.

대표청구항 ▼

In an aircraft jet engine nacelle adapted to permit operation of the aircraft at low noise levels at take-off and landing, the combination comprising: (a) a nose cowl defining an inlet, the nose cowl having an airflow surface with an acoustic liner on substantially the entire airflow surface thereof

In an aircraft jet engine nacelle adapted to permit operation of the aircraft at low noise levels at take-off and landing, the combination comprising: (a) a nose cowl defining an inlet, the nose cowl having an airflow surface with an acoustic liner on substantially the entire airflow surface thereof, and anti-icing means disposed at least in part at the forwardmost portion of the nose cowl and having an acoustic liner thereon; (b) a nose dome portion on a fan section for the engine, the nose dome portion having an airflow surface with an acoustic liner on the airflow surface thereof; (c) a ring disposed concentrically of the nose cowl and the nose dome portion, the ring having an airflow surface with an acoustic liner on substantially the entire airflow surface thereof; (d) a long fan duct extending from the fan section to a thrust reverser, the fan duct comprising inner and outer wall portions and splitters disposed between the inner and outer wall portions, with at least the inner and outer wall portions having airflow surfaces with acoustic liners on the airflow surfaces thereof; (e) forward and aft cowls circumscribing the engine; and (f) a thrust reverser and nozzle defining an exhaust.