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

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EN
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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.
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1--6
Opis fizyczny
Bibliogr. 13 poz., il. kolor., wykr.
Twórcy
  • Poznan University of Technology, Faculty of Mechanical Engineering and Management, Institute of Applied Mechanics, Jan Pawel II 24 Street, 61-139 Poznan, wojciech.lapka@put.poznan.pl
Bibliografia
  • 1. M. H. Khairuddin, M. F. M. Said, A. A. Dahlan, K. A. Kadir, Review on Resonator and Muffler Configuration Acoustics, Archives of Acoustics, 43(3) (2018) 369 - 384.
  • 2. W. Łapka, Transmission loss and pressure drop of selected range of helicoidal resonators, Vibrations in Physical Systems, 26 (2014) 121 - 128.
  • 3. W. Łapka, Acoustic attenuation performance of a round silencer with the spiral duct at the inlet, Archives of Acoustics, 32(4) (Supplement) (2007) 247 - 252.
  • 4. W. Łapka, Insertion loss of spiral ducts - measurements and computations, Archives of Acoustics, 34(4) (2009) 537 - 545.
  • 5. W. Łapka, Numerical Analysis of Sound Propagation in Selected Acoustical System with Helicoidal Resonator Placed in Cylindrical Duct with 90 Degree Elbow, Vibrations in Physical Systems, 29 (2018) 2018018-1 - 2018018-6.
  • 6. W. Łapka, Numerical Study of Acoustic-Structure Interaction of Selected Helicoidal Resonator with Flexible Helicoidal Profile, Archives of Acoustics, 43(1) (2018) 83 - 92.
  • 7. W. Łapka, C. Cempel, Acoustic attenuation performance of Helmholtz resonator and spiral duct, Vibrations in Physical Systems, 23 (2008) 247 - 252.
  • 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.
  • 9. W. Łapka, C. Cempel, Noise reduction of spiral ducts, International Journal of Occupational Safety and Ergonomics (JOSE), 13(4) (2007) 419 - 426.
  • 10. W. Łapka, C. Cempel, Acoustic filter for sound attenuation in ducted systems, Polish Patent, PAT.216176, Date of publication 31.03.2014.
  • 11. S. Marburg, B. Nolte, Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods, 578, Springer-Verlag, Berlin, Germany, 2008.
  • 12. M. L. Munjal, Acoustics of Ducts and Mufflers with Application to Exhaust and Ventilation System Design, Inc., Calgary, Canada, John Wiley & Sons, 1987.
  • 13. A. Snakowska, Teoria pola akustycznego zastosowana do badania układów o symetrii cylindrycznej, ISBN 978-83-66016-08-8, Wydawnictwo AGH, Kraków, 2018.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-1b36f312-d012-47b2-a99e-facbc960f541
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