Thesis-2001-Greaves.pdf (3.54 MB)
Download fileAcoustic liners of jet engines
thesis
posted on 2018-07-09, 15:51 authored by Matthew GreavesAcoustic liners employing the Helmholtz resonator concept are commonly used in the
intake duct of modern jet engines to reduce radiated noise. In response to reports of core
failures, the possibility of acoustic loading as the source of these liner failures is
investigated. Experimental data are used as input to a model for non-rigid cavity walls
and the induced stresses analysed. An alternative, more robust, liner design utilizing
viscous damping is proposed, and an analytical model developed and numerically
validated against published data. A study of the key parameters leads to an improved
configuration, the attenuating properties of which are compared to a typical liner.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering