BEM Modeling of Mufflers with Diesel Particulate Filters and Catalytic Converters
2009-01-2225
05/19/2009
- Event
- Content
- 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.
- Pages
- 6
- Citation
- Jiang, C., Wu, T., and Herrin, D., "BEM Modeling of Mufflers with Diesel Particulate Filters and Catalytic Converters," SAE Technical Paper 2009-01-2225, 2009, https://doi.org/10.4271/2009-01-2225.