Design of a Multi-Chamber Silencer for Turbocharger Noise

Event
SAE 2009 Noise and Vibration Conference and Exhibition
Authors Abstract
Content
A multi-chamber silencer is designed by a computational approach to suppress the turbocharger whoosh noise downstream of a compressor in an engine intake system. Due to the significant levels and the broadband nature of the source spanning over 1.5 – 3.5 kHz, three Helmholtz resonators are implemented in series. Each resonator consists of a chamber and a number of slots, which can be modeled as a cavity and neck, respectively. Their target resonance frequencies are tuned using Boundary Element Method to achieve an effective noise reduction over the entire frequency range of interest. The predicted transmission loss of the silencer is then compared with the experimental results from a prototype in an impedance tube setup. In view of the presence of rapid grazing flow, these silencers may be susceptible to whistle-noise generation. Hence, the prototype is also examined on a flow bench at varying flow rates to assess such flow-acoustic coupling. The resulting configuration has provided a satisfactory control of the whoosh noise.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-2048
Pages
6
Citation
Lee, I., Selamet, A., Kim, H., Kim, T. et al., "Design of a Multi-Chamber Silencer for Turbocharger Noise," SAE Int. J. Passeng. Cars - Mech. Syst. 2(1):1339-1344, 2009, https://doi.org/10.4271/2009-01-2048.
Additional Details
Publisher
Published
May 19, 2009
Product Code
2009-01-2048
Content Type
Journal Article
Language
English