Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications
This paper presents a combined experimental and numerical investigation on a novel liner concept for enhanced low-frequency and broadband acoustic attenuation. In particular, two different realizations, derived from conventional Helmholtz resonators (HR) and plate resonators (PR) are investigated, w...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/10/1/5 |
| _version_ | 1797439171097264128 |
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| author | Moritz Neubauer Julia Genßler Vincent Radmann Fleming Kohlenberg Michael Pohl Kurt Böhme Karsten Knobloch Ennes Sarradj Klaus Höschler Niels Modler Lars Enghardt |
| author_facet | Moritz Neubauer Julia Genßler Vincent Radmann Fleming Kohlenberg Michael Pohl Kurt Böhme Karsten Knobloch Ennes Sarradj Klaus Höschler Niels Modler Lars Enghardt |
| author_sort | Moritz Neubauer |
| collection | DOAJ |
| description | This paper presents a combined experimental and numerical investigation on a novel liner concept for enhanced low-frequency and broadband acoustic attenuation. In particular, two different realizations, derived from conventional Helmholtz resonators (HR) and plate resonators (PR) are investigated, which both deploy flexible materials with material inherent damping. In this context, a comprehensive experimental investigation was carried out focusing the identification and evaluation of various geometric parameters and material properties on the acoustics dissipation and related properties of various materials in a simplified setup of a single Helmholtz resonator with flexible walls (FHR concept). Furthermore, a parameter study based on analytical models was performed for both liner concepts, taking into account material as well as geometric parameters and their effects on transmission loss. In addition, design concepts that enable cylindrical or otherwise curved liner structures and the corresponding manufacturing technologies are presented, while considering essential structural features such as drainage. With respect to the potential application in jet engines, a structural–mechanical analysis considering the relevant load cases to compare and discuss the mechanical performance of a classical HR and the FHR concept liner is presented. Finally, both concepts are evaluated and possible challenges and potentials for further implementation are described. |
| first_indexed | 2024-03-09T11:48:52Z |
| format | Article |
| id | doaj.art-d69d0f900dd84db3b3cc0972ca4f6881 |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-09T11:48:52Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-d69d0f900dd84db3b3cc0972ca4f68812023-11-30T23:17:59ZengMDPI AGAerospace2226-43102022-12-01101510.3390/aerospace10010005Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine ApplicationsMoritz Neubauer0Julia Genßler1Vincent Radmann2Fleming Kohlenberg3Michael Pohl4Kurt Böhme5Karsten Knobloch6Ennes Sarradj7Klaus Höschler8Niels Modler9Lars Enghardt10Institute of Lightweight Engineering and Polymer Technology (ILK), Technische Universität Dresden, Holbeinstraße 3, 01307 Dresden, GermanyInstitute of Fluid Dynamics and Engineering Acoustics, Technische Universität Berlin, Müller-Breslau-Str. 8, 10623 Berlin, GermanyInstitute of Fluid Dynamics and Engineering Acoustics, Technische Universität Berlin, Einsteinufer 25, 10587 Berlin, GermanyInstitute of Fluid Dynamics and Engineering Acoustics, Technische Universität Berlin, Müller-Breslau-Str. 8, 10623 Berlin, GermanyChair of Aero Engine Design, Brandenburg University of Technology Cottbus-Senftenberg, Siemens-Halske-Ring 14, 03046 Cottbus, GermanyInstitute of Lightweight Engineering and Polymer Technology (ILK), Technische Universität Dresden, Holbeinstraße 3, 01307 Dresden, GermanyGerman Aerospace Center (DLR), Institute of Propulsion Technology, Engine Acoustics, Müller-Breslau-Str. 8, 10623 Berlin, GermanyInstitute of Fluid Dynamics and Engineering Acoustics, Technische Universität Berlin, Einsteinufer 25, 10587 Berlin, GermanyChair of Aero Engine Design, Brandenburg University of Technology Cottbus-Senftenberg, Siemens-Halske-Ring 14, 03046 Cottbus, GermanyInstitute of Lightweight Engineering and Polymer Technology (ILK), Technische Universität Dresden, Holbeinstraße 3, 01307 Dresden, GermanyInstitute of Fluid Dynamics and Engineering Acoustics, Technische Universität Berlin, Müller-Breslau-Str. 8, 10623 Berlin, GermanyThis paper presents a combined experimental and numerical investigation on a novel liner concept for enhanced low-frequency and broadband acoustic attenuation. In particular, two different realizations, derived from conventional Helmholtz resonators (HR) and plate resonators (PR) are investigated, which both deploy flexible materials with material inherent damping. In this context, a comprehensive experimental investigation was carried out focusing the identification and evaluation of various geometric parameters and material properties on the acoustics dissipation and related properties of various materials in a simplified setup of a single Helmholtz resonator with flexible walls (FHR concept). Furthermore, a parameter study based on analytical models was performed for both liner concepts, taking into account material as well as geometric parameters and their effects on transmission loss. In addition, design concepts that enable cylindrical or otherwise curved liner structures and the corresponding manufacturing technologies are presented, while considering essential structural features such as drainage. With respect to the potential application in jet engines, a structural–mechanical analysis considering the relevant load cases to compare and discuss the mechanical performance of a classical HR and the FHR concept liner is presented. Finally, both concepts are evaluated and possible challenges and potentials for further implementation are described.https://www.mdpi.com/2226-4310/10/1/5acoustic linerplate resonatorHelmholtz resonatorbroadband noisehoneycomb structuremodel |
| spellingShingle | Moritz Neubauer Julia Genßler Vincent Radmann Fleming Kohlenberg Michael Pohl Kurt Böhme Karsten Knobloch Ennes Sarradj Klaus Höschler Niels Modler Lars Enghardt Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications Aerospace acoustic liner plate resonator Helmholtz resonator broadband noise honeycomb structure model |
| title | Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications |
| title_full | Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications |
| title_fullStr | Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications |
| title_full_unstemmed | Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications |
| title_short | Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications |
| title_sort | experimental and numerical investigation of novel acoustic liners and their design for aero engine applications |
| topic | acoustic liner plate resonator Helmholtz resonator broadband noise honeycomb structure model |
| url | https://www.mdpi.com/2226-4310/10/1/5 |
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