초록 ▼

A quiet nacelle system for jet aircraft engines includes an elongated nose cowl and nose dome of the nacelle and a sound-attenuating liner applied to the nose cowl, nose dome and fan duct components. The system is particularly suitable for JT3D-3B and JT3D-7 engines for use with DC-8 aircraft. The c

A quiet nacelle system for jet aircraft engines includes an elongated nose cowl and nose dome of the nacelle and a sound-attenuating liner applied to the nose cowl, nose dome and fan duct components. 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) an elongated nose cowl defining an inlet, the nose cowl having an air flow surface with an acoustic liner on substantially the entire airflow sur

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) an elongated nose cowl defining an inlet, the nose cowl having an air flow surface with an acoustic liner on substantially the entire airflow surface thereof and an anti-icing portion at the fowardmost portion of the nose cowl and having no acoustic liner thereon, (b) a nose dome on a fan section for the engine with no acoustic liner thereon, and a nose dome extension disposed between the nose dome and the fan section, the extension having an airflow surface with an acoustic liner on the airflow surface thereof, (c) 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 the inner and outer wall portions having airflow surfaces with acoustic liners on the airflow surfaces thereof and the splitters having air flow surfaces with acoustic liners on the airflow surfaces thereof, (d) forward and aft cowls circumscribing the engine, and (e) the thrust reverser and a nozzle defining an exhaust.