Publication detail
Efficient computational modelling of low loaded bearings of turbocharger rotors
NOVOTNÝ, P. HRABOVSKÝ, J.
English title
Efficient computational modelling of low loaded bearings of turbocharger rotors
Type
journal article in Web of Science
Language
en
Original abstract
The overall efficiency of turbochargers is a strictly monitored variable in all applications. Increasing the overall efficiency is closely related to the mechanical efficiency and hence the rotor bearing system. This paper presents a new computational model describing the behaviour of the thrust bearings of the turbocharger rotor under different operating conditions. The model assumes steady state turbulent flow of lubricant through a thin lubrication gap in the form of a two-phase fluid. Fluid flow is affected by centrifugal forces due to high rotor speeds and by the change in lubricant properties due to pressure, temperature and shear rate. The model is designed to allow a very fast and efficient steady state solution for many input parameter variations, while maintaining a sustainable physical depth of description of the reality. The new computational model is confronted with three-dimensional higher-level models and verified by technical experiments on a real combustion engine turbocharger.
English abstract
The overall efficiency of turbochargers is a strictly monitored variable in all applications. Increasing the overall efficiency is closely related to the mechanical efficiency and hence the rotor bearing system. This paper presents a new computational model describing the behaviour of the thrust bearings of the turbocharger rotor under different operating conditions. The model assumes steady state turbulent flow of lubricant through a thin lubrication gap in the form of a two-phase fluid. Fluid flow is affected by centrifugal forces due to high rotor speeds and by the change in lubricant properties due to pressure, temperature and shear rate. The model is designed to allow a very fast and efficient steady state solution for many input parameter variations, while maintaining a sustainable physical depth of description of the reality. The new computational model is confronted with three-dimensional higher-level models and verified by technical experiments on a real combustion engine turbocharger.
Keywords in English
Thrust bearingTurbochargerLubricationTurbulenceCentrifugalTwo-phase lubricant
Released
15.05.2020
Publisher
Elsevier B.V.
ISSN
0020-7403
Volume
174
Number
2020
Pages from–to
374–383
Pages count
10
BIBTEX
@article{BUT162238,
author="Pavel {Novotný} and Jozef {Hrabovský},
title="Efficient computational modelling of low loaded bearings of turbocharger rotors",
year="2020",
volume="174",
number="2020",
month="May",
pages="374--383",
publisher="Elsevier B.V.",
issn="0020-7403"
}