Tuning the Selected Acoustic Helicoidal Resonator with a Short Flat Bar – Numerical Analysis
[ 1 ] Instytut Mechaniki Stosowanej, Wydział Budowy Maszyn i Zarządzania, Politechnika Poznańska | [ P ] employee
2019
scientific article
english
- acoustic helicoidal resonator
- tuning
- sound propagation
- flat bar
- ducts and mufflers
EN This paper describes the possible way of tuning the selected acoustical helicoidal resonator placed in straight cylindrical duct by the use of a short flat bar. The acoustic attenuation performance (transmission loss) of helicoidal resonator has emphatically changed with the change of the length and the degree of rotation of a short flat bar placed close to the resonator. The finite element numerical calculations of the acoustical systems were made in COMSOL Multiphysics computational environment. The results show that the change of length and rotation of short flat bar can widely change the resonance frequencies of helicoidal resonator. So in this work were presented the possible simple tuning options for the acoustic helicoidal resonator applied in ducted systems.
2019140-1 - 2019140-6
CC BY (attribution alone)
open journal
final published version
at the time of publication
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