Performance Evaluation of a Reactive Muffler Using CFD

Abstract

The main objective of this study was to simulate and investigate the performance of a reactive muffler by simulation technique. The dimensions of Alfa Romeo 145 vehicle model 1999 muffler were used to perform the simulation. The simulation was carried out using a commercial software package named FLUENT. In this package, a program GAMBIT was used to create a mesh surface and to define the boundary conditions of the required object, which was read and analyzed by FLUENT. The result shows that CFD can be used to evaluate both the mean flow and acoustic performance of a reactive muffler.

Keywords: Reactive muffler, Aero-acoustics, CFD, Sound attenuation, FLUENT, Exhaust noise reduction