NUMERICAL MODEL FOR THE ANALYSIS OF ACOUSTIC WAVE PROPAGATION IN AN EXHAUST DRUM

Abstract

Nowadays, noise level is a very important factor of pollution of the environment, of the comfort of life, especially in cities. One of the most important sources of noise is the noise produced by motor vehicles. In this context, an element to reduce the noise level is the exhaust drum, which over time has experienced various constructional and dimensional variants, which will make it as effective as possible. In addition to an experimental study, today we can add a numerical study of the propagation of acoustic waves in the exhaust drum. This paper presents a hypothetical numerical study of an exhaust drum, which can be developed and adapted for any engine, for any constructive and dimensional solution. The numerical analysis presented is performed by the finite elements method, using the ANSYS program, which offers a number of advantages, among which the finite elements dedicated and the consideration of the frequency of the sound waves are the most important offered facilities. The paper also presents a model for analyzing the results through post-processing graphics, which allows to substantiate the conclusions.