Simulation analysis of acoustic attenuation performance for different shape of an expansion chamber silencer

Zhaorong Zhang, Jianliang Li, Cheuk Ming Mak

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)

Abstract

This paper studied the internal laws of silencers' acoustic attenuation performance, when the cross-sectional shape, length and diameter of the expansion chamber changed. Based on the BEM-FEM coupled model and to combine with the improved Four-pole Parameters Method, the transmission loss (TL) was calculated. It is pointed that the flatter the expansion chamber is, the worse the performance is. When the length decreases, the domes of the TL become broader, and the number of domes decreases. When the diameter increases, the TL increases, but the growth rate and the inactive frequency decrease. The results indicate that by using computer modeling analysis, it is sensible to optimize the shape to meet the needs of the eliminating frequency band and the applied circumstance.
Original languageEnglish
Title of host publication2009 2nd International Conference on Information and Computing Science, ICIC 2009
Pages10-13
Number of pages4
Volume2
DOIs
Publication statusPublished - 19 Nov 2009
Event2009 2nd International Conference on Information and Computing Science, ICIC 2009 - Manchester, United Kingdom
Duration: 21 May 200922 May 2009

Conference

Conference2009 2nd International Conference on Information and Computing Science, ICIC 2009
Country/TerritoryUnited Kingdom
CityManchester
Period21/05/0922/05/09

Keywords

  • BEM
  • FEM
  • Numerical simulation
  • Silencer

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computational Theory and Mathematics
  • Computer Science Applications
  • Software

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