Jet engine sound-insulation structure

Details Jet engine sound-insulation structure Jet engine sound-insulation structure

1994-11-29

1997-01-14

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181286, 181292, 181294, 181296, F01N 102, F02K 100

Patent

active

055942164

ABSTRACT:
An acoustic structure for use as a sound insulator in a jet engine is disclosed. The structure, which is carried in a sound-absorbing compartment of the engine, includes a framework and an acoustical insulation material disposed within the framework. The material is composed of a rigid matrix of randomly oriented, fused silica fibers having fiber diameters predominantly in the range 2-8 .mu.m, a three-dimensionally continuous network of open, intercommunicating voids, a flow resistivity between about 10-200K rayls/m, and a density of between about 2 and 8 lb/ft3. Also disclosed are a clad acoustical structure for sound attenuation in a jet engine, where operational temperatures exceed current jet engine designs, and a method of attenuating jet engine noise.

REFERENCES:
patent: 3021916 (1962-02-01), Kemp
patent: 3211253 (1965-10-01), Gonzalez
patent: 4147578 (1979-04-01), Koss
patent: 4453887 (1984-06-01), Schucker
patent: 4849276 (1989-06-01), Bendig et al.

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