Acoustic attenuation performance of Helmholtz resonator and spiral duct

• Autorzy: Łapka W. , Cempel C.
• Konferencja: Symposium Vibrations In Physical Systems (23 ; 28-31.05.2008 ; Będlewo koło Poznania ; Polska)
• Języki publikacji: EN

Abstrakty

EN

This work examines a comparison of acoustic attenuation performance of well known Helmholtz resonator and spiral element inserted into circular duct, which creates spiral duct. The paper consists results of numerical computations by the use of Finite Element Method. Here the spiral is a kind of resonant element, which can be applied in circular ducts, mainly for low speed velocity ducts e.g. ventilation, air-conditioning and heat systems. Results are presented as a transmission loss. The sound attenuation performances of Helmholtz resonator and spiral duct depend on their geometrical relationships. The most important observation is that the sound attenuation in both solutions are based on similar phisical phenomenon – resonance.

Słowa kluczowe

EN

spiral duct; acoustic resonator; sound attenuation

PL

przewód spiralny; rezonator akustyczny; tłumienie dźwięku

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2008
• Tom: Vol. 23
• Strony: 247--252
• Opis fizyczny: Bibliogr. 6 poz., il. kolor., 1 wykr.

Twórcy

autor

Łapka W.

• Poznań University of Technology, Institute of Applied Mechanics, Piotrowo 3 Street, 60-965 Poznań, Poland

autor

Cempel C.

• Poznań University of Technology, Institute of Applied Mechanics, Piotrowo 3 Street, 60-965 Poznań, Poland

Bibliografia

• 1. ŁAPKA W., „Acoustic attenuation performance of a round silencer with the spiral duct at the inlet”, Archives of Acoustics Vol. 32, No 4 (Supplement), 2007, pp. 247-252.
• 2. ŁAPKA W., CEMPEL C., „Noise reduction of spiral ducts”, International Journal of Occupational Safety and Ergonomics (JOSE), Vol. 13, No. 4, 2007, pp. 419-426.
• 3. ŁAPKA W., CEMPEL C. „Spiral waveguide and damper”, The 36th International Congress & Exhibition on Noise Control Engineering, Global Approaches to Noise Control, Istanbul, Turkey, 28-31 August 2007, p. 8 on CD.
• 4. ŁAPKA W., CEMPEL C., “Insertion loss of spiral acoustic duct – computational modeling”, 35th Winter School on Vibroacostical Hazards Suppressions, Wisła, Poland, February 26 – March 02, 2007, pp. 83-94.
• 5. MUNJAL M. L., “Acoustics of Ducts and Mufflers with Application to Exhaust and Ventilation System Design”, John Wiley & Sons, Inc., Calgary, Canada 1987, p.328.
• 6. COMSOL Multiphysics version 3.3a, Acoustic Module, COMSOL AB, www.comsol.com, Stockholm, Sweden, 1996-2006.