Mixed 3D numerical approach on the exhaust radiated noise prediction 1 Istituto Motori -CNR- Naples Italy 2 DPA, Department of Aeronautical Engineering, University of Naples "FedericoII"

Format:

Conference/Event

Author/Creator:

Siano, D., author.

Conference Name:

7th International Conference on Engines for Automobile (2005-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Naples, ITALY Consiglio Nazionale delle Ricerche 2005

Summary:

The paper describes a comparative analysis between numerical and experimental study on an exhaust system of a single cylinder diesel engine. Previous experimental investigations concerned the gas-borne noise characterization of the engine and an experimental campaign on the evaluation of the transmission loss factor of the tested exhaust system. Contemporarily, a 3D numerical model of the system has been created in order to obtain a validate tool able to predict the radiated noise in the environment. The created model represents a mixed FEM-BEM application. In addition, a CFD model has been created in order to better simulate the fluid flow pulsation and to calculate the flow interactions with the external skin of the muffler, too, in terms of structural vibrations. Based upon these information the radiated power has been evaluated on the FEM-BEM 3D model and then compared with the experimental data. The results have shown a good numerical approach able to simulate the fluid flow pulsation and the acoustic radiated noise. Future interventions could concern the possibility to improve the muffler design, in order to reduce not only the exhaust radiated noise but also its structural vibrations

Notes:

Vendor supplied data

Publisher Number:

2005-24-022

Access Restriction:

Restricted for use by site license