Tuning the selected acoustic helicoidal resonator with a short flat bar - numerical analysis

• Autorzy: Łapka Wojciech
• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

acoustic helicoidal resonator; tuning; sound propagation; flat bar; ducts; mufflers

PL

spiralny rezonator akustyczny; strojenie; propagacja dźwięku; płaskownik; tłumiki

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2019
• Tom: Vol. 30, nr 1
• Strony: art. no. 2019140
• Opis fizyczny: Bibliogr. 13 poz., il. kolor., wykr.

Twórcy

autor

Łapka Wojciech

• Poznan University of Technology, Faculty of Mechanical Engineering and Management, Institute of Applied Mechanics, Jan Pawel II 24 Street, 61-139 Poznan

Bibliografia

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• 2. W. Łapka, Transmission loss and pressure drop of selected range of helicoidal resonators, Vibrations in Physical Systems, 26 (2014) 121 - 128.
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• 4. W. Łapka, Insertion loss of spiral ducts - measurements and computations, Archives of Acoustics, 34(4) (2009) 537 - 545.
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• 8. W. Łapka, C. Cempel, Computational and experimental investigations of a sound pressure level distribution at the outlet of the spiral duct, Archives of Acoustics, 33(4) (Supplement) (2008) 65 - 70.
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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).