The reduction of aircraft engine fan-compressor noise using acoustic linings
1971; Elsevier BV; Volume: 18; Issue: 4 Linguagem: Inglês
10.1016/0022-460x(71)90107-6
ISSN1095-8568
Autores Tópico(s)Aerodynamics and Fluid Dynamics Research
ResumoThe development of a method is described for reducing the approach-landing noise of commercial jet transports by means of acoustic linings for attenuating the noise generated by the fan-compressor in turbofan engines and radiated from the intake and fan-exit ducts. The method is applied in particular to the Pratt & Whitney JT3D engine powering the Boeing 707 and the Douglas DC-8 aircraft. A brief discussion is given on the general characteristics of aircraft subjective noise spectra, engine noise reduction techniques, results of research and development on acoustic linings, lining technology and full scale engine testing. Finally, a summary of areas of lining research and technology requiring further investigation is given.
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