Title: Acoustic simulation for exhaust silencer of vehicle engine with combined one/three-dimensional approach

Authors: Sifa Zheng; Zhongxu Kang; Xiaomin Lian

Addresses: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China ' Beijing Municipal Institute of Labour Protection, Beijing 100054, China ' State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China

Abstract: In this study, a new approach to simulate the exhaust silencer is studied to improve the acoustics performance of a vehicle. A combined one-/three-dimensional approach is developed to carry out the simulation of exhaust silencer under working conditions. The acoustic performance of silencer is computed with three-dimensional method in frequency domain, and the other parts of the engine and exhaust system are calculated with one-dimensional method in time domain. The insertion loss of the exhaust silencer is then calculated with a combined model. With the present approach, the insertion loss of an exhaust silencer with catalytic converter is calculated. The simulation results agree well with the experimental results, which validates the reliability and accuracy of the present approach.

Keywords: exhaust silencers; acoustic simulation; one/three-dimensional approach; vehicle design; vehicle exhausts; acoustics performance; vehicle noise; insertion loss; modelling; catalytic converter.

DOI: 10.1504/IJVD.2012.049164

International Journal of Vehicle Design, 2012 Vol.60 No.1/2, pp.57 - 70

Received: 11 Apr 2011
Accepted: 29 Jan 2012
Published online: 23 Apr 2013 *

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