Development of acoustic liner in aero engine: a review
| Autor: | ZhengTao Su, XuQiang Ma |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Broadband noise
Computer science Noise reduction General Engineering Mechanical engineering 02 engineering and technology Aero engine Acoustic absorption 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Turbofan Noise Temperature and pressure Noise control General Materials Science 0210 nano-technology |
| Zdroj: | Science China Technological Sciences. 63:2491-2504 |
| ISSN: | 1869-1900 1674-7321 |
| Popis: | Noise reduction for aircraft engine has attracted great concern due to the strict noise control regulation nowadays. Conventional perforated sheet-over-honeycomb acoustic liners have been widely used to attenuate turbofan engine noise. To dampen the broadband noise and resist the harsh service conditions with high temperature and pressure in modern turbofan engine, new acoustic liner concepts are proposed and evaluated in the latest decade. In this review, available studies regarding the recent development of liners are gathered. The paper starts with the introduction of acoustic absorption mechanism of local-reacting and extended-reacting liners. The progress of novel passive liners (e.g., mesh-cap liner, variable-depth liner, metal foam liner, hybrid liner, etc.) is summarized. Furthermore, adaptive liners with tunable geometry dimension or bias flow are illustrated in details. Metamaterial is also mentioned as a hot candidate in the next generation of acoustic liners. Finally, this review identifies benefits and some technical challenges with the goal of unveiling the potential of novel acoustic liner technologies in aero engine. |
| Databáze: | OpenAIRE |
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