BEM modeling of mufflers with diesel particulate filters and catalytic converters

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


In this paper, the transmission loss (TL) of mufflers with a built-in catalytic converter (CC) and/or a diesel particulate filter (DPF) is predicted using the boundary element method (BEM) by either modeling the CC or DPF as a block of bulk-reacting material or by using the "element-to-element four-pole connection" between two BEM substructures. The four-pole parameters of the CC or DPF can be obtained by a measurement procedure that involves using the two-source method on a test rig with a pair of transition cones followed by a few 1-D four-pole matrix inverse operations to extract the parameters. A 3-D BEM based optimization may be further applied to fine-tune the extracted four-pole parameters. To use the bulk-reacting material modeling in BEM, the four-pole parameters will have to be converted into an equivalent set of bulk-reacting material properties. Test cases including a muffler with a series connection of CC and DPF are presented in this paper. The BEM predictions are compared to available experimental results.

Original languageEnglish
JournalSAE Technical Papers
StatePublished - 2009
EventSAE 2009 Noise and Vibration Conference and Exhibition, NVC 2009 - St. Charles, IL, United States
Duration: May 19 2009May 19 2009

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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