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Transient thrust forces on a twin scroll turbocharger
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
2017 (English)In: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, ASME Press, 2017, Vol. 8Conference paper (Refereed)
Abstract [en]

The bearing system of turbochargers used in trucks needs to be optimized in order to reduce the frictional losses. This helps in transmitting the exhaust energy more efficiently to the compressor wheel to increase boost pressure. Understanding the thrust loading on the axial bearing helps in optimal design of the bearing and the associated lubrication system. With the advent of twin scroll turbochargers, it is necessary to understand the thrust load behaviour at different operating conditions. This paper pioneers in studying the unsteady axial loads measured on a twin scroll turbocharger mounted on a 6 cylinder, 13 litre diesel engine used in the truck industry along with the corresponding analytical predictions for varied engine speeds and loading conditions. Transient thrust forces were measured using a weakened bearing in the experimental approach along with transient pressure measurments on the turbocharger. The axial bearing weakening required a design trade-off between flexibility and rigidity of the bearing. The results from the experimental and analytical methods provide better understanding of the characteristics of transient thrust forces that act on a turbocharger mounted on an engine of a heavy duty truck along with its design implications. The maximum normalized axial load measured and predicted were -90 N and -100 N, respectively.

Place, publisher, year, edition, pages
ASME Press, 2017. Vol. 8
Series
Proceedings of the ASME Turbo Expo, 8
National Category
Other Engineering and Technologies
Identifiers
URN: urn:nbn:se:kth:diva-216331DOI: 10.1115/GT2017-63658Scopus ID: 2-s2.0-85029002816ISBN: 9780791850954 OAI: oai:DiVA.org:kth-216331DiVA: diva2:1151380
Conference
ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017, Charlotte, United States, 26 June 2017 through 30 June 2017
Note

QC 20171023

Available from: 2017-10-23 Created: 2017-10-23 Last updated: 2017-10-23Bibliographically approved

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CiteExportLink to record
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Cite
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