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Simulation of sound transmission through automotive turbochargers
KTH, School of Industrial Engineering and Management (ITM), Centres, Competence Center for Gas Exchange (CCGEx).
2012 (English)In: SAE Technical Paper 2012-01-1560, 2012, 2012Conference paper, Published paper (Refereed)
Abstract [en]

The use of turbochargers for production cars has been increasing due to the current trend of engine downsizing. Acoustically, it acts as a damper of the pressure pulsations from the engine that propagate through the intake and exhaust system. This effect is referred to as the passive acoustic properties of a turbocharger. The aim of this paper is to investigate the passive acoustic properties of an automotive turbocharger compressor and turbine and to develop and verify an acoustical model of the turbocharger. To investigate the acoustic properties such as the transmission loss and the transfer function through these elements under different operating conditions, acoustic two-port measurements were performed on a turbocharger test rig at different flow conditions. A geometry-based acoustical model of the turbocharger was developed for both the compressor and turbine to provide both the transmission loss and the transfer function of these elements and verified by means of non-linear time-domain 1-D gas dynamics simulation. A good agreement between measurement and simulation of the upstream and downstream acoustic transmission loss of the turbocharger was achieved and it also illustrates an improvement of simulation quality using the new models.

Place, publisher, year, edition, pages
2012.
Keyword [en]
Acoustic properties, Computer simulation, Exhaust systems (engine), Superchargers, Transfer functions, Turbines, Wave transmission
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-131359DOI: 10.4271/2012-01-1560Scopus ID: 2-s2.0-8487716749OAI: oai:DiVA.org:kth-131359DiVA: diva2:656603
Conference
7th International Styrian Noise, Vibration and Harshness Congress: The European Automotive Noise Conference, SNVH 2012; Graz; Austria; 13 June 2012 through 15 June 2012
Note

QC 20131016

Available from: 2013-10-16 Created: 2013-10-14 Last updated: 2013-10-16Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf