Aircraft engines, typically turbofans, use acoustic liners to damp engine noise. Liners are applied on the internal walls of the engine nacelle, both in the intake and by-pass ducts, and use …

Aero-engine acoustic liners are an essential feature of low-noise jet aircraft, but, in addition to noise requirements, acoustic liners must satisfy many other design constraints

ansformed to have an adaptive design. Replacement of one of the standard rigid walls with a voltage tunable compliant diaphragm yields an adaptable target freq. ency for different flight …

2020年8月11日 · Conventional perforated sheet-over-honeycomb acoustic liners have been widely used to attenuate turbofan engine noise. To dampen the broadband noise and resist …

2020年8月11日 · Conventional perforated sheet-over-honeycomb acoustic liners have been widely used to attenuate turbofan engine noise. To dampen the broadband noise and resist …

2022年12月21日 · The application of an acoustic liner does not merely depend on the acoustical performance but also on its ability to withstand the conditions during the operation inside a jet …

Innovators at NASA's Glenn and Langley Research Centers are teaming to develop a compact, lightweight acoustic liner based on oxide/oxide ceramic matrix composite (CMC) materials. …

2018年9月1日 · A novel type of acoustic liner, characterized through the utilization of specific composite materials with tailored intrinsic damping, is investigated with regard to broadening …

2022年10月27日 · A different noise reduction solution, with a potential application for JIN, is the acoustic liner. This concept is based on an array of Helmholtz resonators, comprising a porous …

2022年5月26日 · Jet engine acoustic treatments are a critical component of modern aviation, as they play a vital role in reducing the noise generated by jet engines. These treatments involve …