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Novel liner concepts

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


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/
Document Type:Article
Title:Novel liner concepts
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bake, FriedrichFriedrich.Bake (at) dlr.dehttps://orcid.org/0000-0002-3235-428X
Knobloch, KarstenKarsten.Knobloch (at) dlr.dehttps://orcid.org/0000-0002-3424-0809
Date:16 March 2019
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1007/s13272-019-00380-7
Page Range:pp. 123-136
Series Name:Special Issue on Aircraft Noise Generation and Assessment
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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