Modeling and Computation of Plate Resonator Silencers

• Applicant: Professor Dr.-Ing. Ennes Sarradj, since 9/2023
• Subject Area: Acoustics ; Lightweight Construction, Textile Technology
• Term: from 2019 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 416728326

• Final Report Year: 2024

Final Report Abstract

As acoustic wall linings in ducts, plate resonators offer various advantages in addition to their damping effects. Due to their smooth and impermeable surface they are insensitive to contaminations by particles in the fluid and offer a very low flow resistance. Even though they have been in use for long time, there is still a lack of understanding of the underlying physics and of tools for targeted design. Therefore, the researche project concerned with a three-dimensional further development of a semi-analytical model for calculating the damping of plate resonator silencer. This was successfully implemented and validated with numerical and experimental investigations. Based on this, the model was extended in a way that segmented plate resonators can be caluclated. This extension was also succesfully validated by numerical and experimentall investigations. Afterwards, the semi-analytical model was used to investigate the influence of the geometry and material input parameters. This allowed design guidelines to be derived, for example to adress different frequency ranges using different plate materials of chamber hights. Furthermore, the behavior of plate resonators under grazing flow conditions can be taken into account by the model and was investigated in detail. Thereby, good agreements could be determined. The feedback of the oscillating plate on the grazing flow was also investigated but did not show any significant effects. To demonstrate the suitability of the semi-analytical model for targeted design of plate resonators, a differential evolution optimization algorithm was applied to calculate optimized plate resonator silencers according to selected target functions. Overall, it could be shown that the extensions of the semi-analytical model provide good results that enable the model to be used for targeted design applications.

Publications

• ,Dreidimensionale Modellierung von Plattenschalldämpfern". In: Fortschritte der Akustik - DAGA 2022, 48. Jahrestagung für Akustik. Deutsche Gesellschaft für Akustik e.V. (DEGA), 2022. ISBN: 978-3-939296-20-1
  Vincent Radmann; Simon Jekosch & Ennes Sarradj
  
• Experimental and Numerical Investigation of Novel Acoustic Liners and Their Design for Aero-Engine Applications. Aerospace, 10(1), 5.
  Neubauer, Moritz; Genßler, Julia; Radmann, Vincent; Kohlenberg, Fleming; Pohl, Michael; Böhme, Kurt; Knobloch, Karsten; Sarradj, Ennes; Höschler, Klaus; Modler, Niels & Enghardt, Lars
  
• Material Selection Process for Acoustic and Vibration Applications Using the Example of a Plate Resonator. Materials, 15(8), 2935.
  Neubauer, Moritz; Schwaericke, Felix; Radmann, Vincent; Sarradj, Ennes; Modler, Niels & Dannemann, Martin
  
• ,,Modellierung von Plattenschalldämpfern mit mehreren Kammern". de. In: Fortschritte der Akustik - DAGA 2023, 49. Jahrestagung für Akustik. Deutsche Gesellschaft für Akustik e. V. (DEGA), 2023. ISBN: 978-3-939296-21-8
  Vincent Radmann & Ennes Sarradj
  
• Experimental and Numerical Analysis of the Vibro-Acoustic Behavior of a Helmholtz Resonator with a Flexible Wall. AIAA AVIATION 2023 Forum.
  Kohlenberg, Fleming; Radmann, Vincent; Genßler, Julia; Enghardt, Lars & Knobloch, Karsten
  
• Modeling of a 3D Plate Resonator Liner and Comparison to Numerical and Experimental Investigations. AIAA AVIATION 2023 Forum.
  Radmann, Vincent; Kohlenberg, Fleming & Sarradj, Ennes
  
• ,,Optimierung der Kammergeometrie von Plattenresonator-Schalldämpfern". In: Fortschritte der Akustik - DAGA 2024, 50. Jahrestagung für Akustik. Deutsche Gesellschaft für Akustik e. V. (DEGA), 2024
  Simon Jekosch; Vincent Radmann & Erik W. Schneehage u. a.
  
• ,,Überströmte Plattenresonator-Schalldämpfer - analytische und experimentelle Untersuchungen". In: Fortschritte der Akustik - DAGA 2024, 50. Jahrestagung für Akustik. Deutsche Gesellschaft für Akustik e. V. (DEGA), 202
  Vincent Radmann; Fleming Kohlenberg & Julia Genßler u. a.
  
• Acouplasi v24.04
  Vincent Radmann; Felix Schwäricke & Simon Jekosch u. a.