title: Noise reduction of spiral ducts.
abstract: The paper presents noise reduction (NR) of spiral ducts as a result of computational modeling of acoustic wave propagation. Three-dimensional models were created with the finite element method in COMSOL Multiphysics version 3.3. Nine models of spiral ducts with 1-9 spiral leads were considered. Time-harmonic analysis was used to predict NR, which was shown in spectral and interval frequency bands. Spiral duct performance can be seen as a comparison of NR before and after a change from a circular to a spiral duct.
authors: Institute of Applied Mechanics, Poznań University of Technology, Poznań, Poland. wlapka@poczta.onet.pl
authors: Wojciech
authors: W
authors: Lapka
authors: Czesław
authors: C
authors: Cempel
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D006801:Humans; D009622:Noise / Q000517:prevention & control*; D009623:Noise, Occupational / Q000517:prevention & control; D013997:Time Factors