Prediction of the performance of the expansion chamber in air ducts

Jianliang Li, Cheuk Ming Mak, Zhaohui Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

An expansion chamber is frequently used as an acoustics silencer for the control of duct-borne noise in ventilation systems. The flow of air and the effect of sound pressure may cause the vibration of the end plates of the expansion chamber and in turn will influence the performance (usually in terms of the transmission loss (TL)) of the expansion chamber. By combining the plate bending element and the plane stress element, BEM (for acoustics systems) and FEM (for the structure analysis) are applied to predict the performance of the expansion muffler. A method for calculating the TL for acoustics silencer using BEM-FEM coupled model is therefore presented, and an improved method based on the four-pole parameters used in the BEM is obtained.
Original languageEnglish
Pages (from-to)185-193
Number of pages9
JournalJournal of Low Frequency Noise Vibration and Active Control
Volume25
Issue number3
DOIs
Publication statusPublished - 1 Jan 2006

Keywords

  • Expansion chamber
  • Performance
  • Silencer
  • Transmission loss

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Geophysics
  • Mechanical Engineering

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