Numerical analysis of sound propagation in selected acoustical system with helicoidal resonator placed in cylindrical duct with 90 degree elbow

• Autorzy: Łapka W.
• Języki publikacji: EN

Abstrakty

EN

This paper concerns to the numerical analysis of transmission loss of selected acoustical helicoidal resonator placed in cylindrical duct close to the elbow. The change of acoustic attenuation performance of helicoidal resonator is observed with the change of the degree of rotation of cylindrical duct elbow. The finite element method was used to calculate the acoustical system in the COMSOL Multiphysics computational environment. The results show that the change of rotation of elbow or rotation of helicoidal profile can change the resonance frequency, and thus the tuning options are extended when applying helicoidal resonators in ducted systems.

Słowa kluczowe

EN

helicoidal resonator; sound propagation; duct elbow; ducted system

PL

rezonator helikoidalny; propagacja dźwięku; łuk kanału; układ kanałowy

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2018
• Tom: Vol. 29
• Strony: art. no. 2018018
• Opis fizyczny: Bibliogr. 11 poz., il. kolor., 1 wykr.

Twórcy

autor

Łapka W.

• Poznan University of Technology, Faculty of Mechanical Engineering and Management, 3 Piotrowo St., 60-965 Poznan

Bibliografia

• 1. COMSOL Multiphysics version 4.2.a, User’s Guide and Model Library Documentation Set, COMSOL AB, www.comsol.com, Stockholm, Sweden, 2011.
• 2. 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.
• 3. W. Łapka, Insertion loss of spiral ducts - measurements and computations, Archives of Acoustics, 34(4) (2009) 537 - 545.
• 4. W. Łapka, Numerical Study of Acoustic-Structure Interaction of Selected Helicoidal Resonator with Flexible Helicoidal Profile, Archives of Acoustics, 43(1) 2018 83 - 92.
• 5. W. Łapka, C. Cempel, Acoustic attenuation performance of Helmholtz resonator and spiral duct, Vibrations in Physical Systems, 23 (2008) 247 - 252.
• 6. 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.
• 7. W. Łapka, C. Cempel, Noise reduction of spiral ducts, International Journal of Occupational Safety and Ergonomics (JOSE), 13(4) (2007) 419 - 426.
• 8. W. Łapka, C. Cempel, Acoustic filter for sound attenuation in ducted systems, Polish Patent, PAT.216176, Date of publication 31.03.2014.
• 9. S. Marburg, B. Nolte, Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods, 578, Springer-Verlag, Berlin, Germany, 2008.
• 10. M. L. Munjal, Acoustics of Ducts and Mufflers with Application to Exhaust and Ventilation System Design, Inc., Calgary, Canada, John Wiley & Sons, 1987.
• 11. L. Ver Istvan, L. Beranek, Noise and vibration control engineering, 2nd edition, John Wiley & Sons, Inc., Hoboken, New Jersey 2005.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).