Modeling of Engine Exhaust Acoustics

Paper #:
  • 1999-01-1665

Published:
  • 1999-05-17
Citation:
Morel, T., Silvestri, J., Goerg, K., and Jebasinski, R., "Modeling of Engine Exhaust Acoustics," SAE Technical Paper 1999-01-1665, 1999, https://doi.org/10.4271/1999-01-1665.
Pages:
14
Abstract:
Exhaust acoustics simulation is an important part of the exhaust system process. Especially important is the trend towards a coupled approach to performance and acoustics design. The present paper describes a new simulation tool developed for such coupled simulations. This tool is based on a one-dimensional fluid dynamics solution of the flow in the engine manifolds and exhaust and intake elements. To represent the often complex geometries of mufflers, an easy-to-use graphical pre-processor is provided, with which the user builds a model representation of mufflers using a library of basic elements. A comparison made to two engines equipped with exhaust silencers, shows that the predictions give good results.
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