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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. KTH, Superseded Departments (pre-2005), Energy Technology.ORCID iD: 0000-0002-1033-9601
2017 (English)In: PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2017, VOL 8, AMER SOC MECHANICAL ENGINEERS , 2017Conference paper, Published 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
AMER SOC MECHANICAL ENGINEERS , 2017.
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:kth:diva-217075ISI: 000412862600009OAI: oai:DiVA.org:kth-217075DiVA: diva2:1159022
Conference
Turbo Expo: Turbomachinery Technical Conference & Exposition
Note

QC 20171121

Available from: 2017-11-21 Created: 2017-11-21 Last updated: 2018-01-13Bibliographically approved

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https://www.asme.org/events/turbo-expo

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Fridh, Jens

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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