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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kunze, Eckart
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024New design for lightweight load introduction elements supported by spider web reinforcement in FRP sandwich structures: Structural behavior analysis using a combined virtual physical building block approach
- 2024Chances and challenges of UV curing in efficient fibre composite manufacturing processes
- 2024Flow Front Monitoring in High-Pressure Resin Transfer Molding Using Phased Array Ultrasonic Testing to Optimize Mold Filling Simulations
- 2024One-Shot-Fertigung von Sandwichstrukturen mit integrierter Sensorik im Nasspressverfahren
- 2024Preliminary studies on fan impellers made of continuous fibre-reinforced polymer in modular design for improved performance in sustainable energy applications
- 2023Flow front monitoring in high-pressure resin transfer molding using phased array ultrasonic testing to optimize mold filling simulations
- 2023Veneer laminates for tubular structures in a tripod – Testing for design and damage modelling approaches
- 2023Herausforderungen dickwandiger, duroplastischer Faser-Kunststoff-Verbunde in der Herstellung sowie mechanischen und zerstörungsfreien Prüfung - Ein Reviewcitations
- 2023Modelling of composite manufacturing processes incorporating large fibre deformations and process parameter interactions
- 2019Experimental and numerical determination of the local fiber volume content of unidirectional non-crimp fabrics with forming effectscitations
- 2019Experimental Study of Advanced Helmholtz Resonator Liners with Increased Acoustic Performance by Utilising Material Damping Effects
- 2018Experimental study of advanced helmholtz resonator liners with increased acoustic performance by utilising material damping effectscitations
- 2018Lärmabsorbierende Kunststoffstrukturen (LAKS)
Places of action
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article
Experimental study of advanced helmholtz resonator liners with increased acoustic performance by utilising material damping effects
Abstract
In aero engines, noise absorption is realised by acoustic liners, e.g., Helmholtz resonator (HR) liners, which often absorb sound only in a narrow frequency range. Due to developments of new engine generations, an improvement of overall acoustic damping performance and in particular more broadband noise absorption is required. In this paper, a new approach to increase the bandwidth of noise absorption for HR liners is presented. By replacing rigid cell walls in the liner's honeycomb core structure by flexible polymer films, additional acoustic energy is dissipated. A manufacturing technology for square honeycomb cores with partially flexible walls is described. Samples with different flexible wall materials were fabricated and tested. The acoustic measurements show more broadband sound absorption compared to a reference liner with rigid walls due to acoustic-structural interaction. Manufacturing-related parameters are found to have a strong influence on the resulting vibration behaviour of the polymer films, and therefore on the acoustic performance. For future use, detailed investigations to ensure the liner segments compliance with technical, environmental, and life-cycle requirements are needed. However, the results of this study show the potential of this novel liner concept for noise reduction in future aero-engines.