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Bake, Friedrich and Knobloch, Karsten (2019) Novel liner concepts. CEAS Aeronautical Journal, 10 (1), pp. 123-136. Springer. DOI: 10.1007/s13272-019-00380-7 ISSN 1869-5590
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Official URL: https://link.springer.com/article/10.1007/s13272-019-00380-7
Abstract
Modern, low-emission aero-engine concepts, such as, for instance, Ultrahigh-Bypass Ratio (UHBR) designs, claim higher demands on the damping performance of acoustic wall treatment, called liner, installed in the engine. New liner concepts are needed providing a more broadband damping efficiency ranging explicitly to the low-frequency range. However, space and weight constrains are still also one of the crucial criteria which need to be fulfilled by the liner structure. To overcome this challenge, two novel liner concepts are presented here. One concept, the hybrid ZML, combines the classical Single-Degree-of-Freedom (SDOF) liner with a Zero-Massflow-Liner (ZML) principle. The other one, the FlexiS concept, takes advantage of the intrinsic material damping of flexible walls within the liner structure. A proof of concepts study of both novel concepts is provided highlighting the enhanced damping performance with respect to broadband capacity and low-frequency damping.
| Item URL in elib: | https://elib.dlr.de/126985/ | |||||||||
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| Document Type: | Article | |||||||||
| Title: | Novel liner concepts | |||||||||
| Authors: |
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| Date: | 16 March 2019 | |||||||||
| Journal or Publication Title: | CEAS Aeronautical Journal | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | Yes | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | Yes | |||||||||
| In ISI Web of Science: | No | |||||||||
| Volume: | 10 | |||||||||
| DOI : | 10.1007/s13272-019-00380-7 | |||||||||
| Page Range: | pp. 123-136 | |||||||||
| Publisher: | Springer | |||||||||
| Series Name: | Special Issue on Aircraft Noise Generation and Assessment | |||||||||
| ISSN: | 1869-5590 | |||||||||
| Status: | Published | |||||||||
| Keywords: | Aeroacoustics, Acoustic damping, Liner, Wall treatment, Novel liner concepts | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||
| HGF - Program: | Aeronautics | |||||||||
| HGF - Program Themes: | propulsion systems | |||||||||
| DLR - Research area: | Aeronautics | |||||||||
| DLR - Program: | L ER - Engine Research | |||||||||
| DLR - Research theme (Project): | L - Turbine Technologies, L - Fan and Compressor Technologies, L - Combustion Chamber Technologies | |||||||||
| Location: | Berlin-Charlottenburg | |||||||||
| Institutes and Institutions: | Institute of Propulsion Technology > Engine Acoustic | |||||||||
| Deposited By: | Bake, Dr.-Ing. Friedrich | |||||||||
| Deposited On: | 03 Apr 2019 14:03 | |||||||||
| Last Modified: | 17 Mar 2020 03:00 |
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