| Título: | Boundary Element Analysis of Reactive Mufflers and Packed Silencers with Catalyst Converters |
| Autores: |
T. W. Wu; epartment of Mechanical Engineering, University of Kentucky C. Y. R. Chen; Nelson Industries, Inc. |
| Fecha: | 2007-10-25 |
| Publicador: | Electronic journal of boundary elements |
| Fuente: |
 |
| Tipo: | |
| Tema: | No aplica |
| Descripción: | This paper reviews recent developments in the application of the boundary element method (BEM) to muffler and silencer analysis. Initial results of modeling built-in catalyst converters are also presented. A so-called “direct mixed-body boundary element methodâ€? has been developed for muffler and silencer analysis since 1996. The idea of the method is to integrate all kinds of different boundary and internal surfaces into a single integral equation set without using the conventional multi-domain approach, even though there may be different media in the domain. A key ingredient in this method is the hypersingular integral equation. The concept of the direct mixedbody BEM is not totally against the conventional multi-domain BEM, though. For very large structures or at high frequencies, a multi-domain or substructuring approach is still necessary in order to reduce the memory usage as well as the computation time. With the direct mixed-body BEM, each substructure does not need to be a well-defined and homogeneous subdomain. As such, substructuring can be done more naturally along the longitudinal direction. Catalyst converters may also be modeled as a modular in the general framework of substructuring. Several test cases are presented with experimental verification, including two cases with built-in converters. |
| Idioma: | Inglés |
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