Modelling the thermal state of a turbocharger bearing housing when calculating the rotor dynamics at transient modes
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 24 November 2021
Issue publication date: 29 March 2022
Abstract
Purpose
The reliability of various mechanisms and machines is determined by the durability of tribo-units, which must ensure operation at high temperatures and an extended range of rotor shaft speeds. The best performance of the bearing assembly is achieved with hydrodynamic lubrication, which depends on optimal operating conditions and temperature conditions. The purpose of this paper is determining the thermal state of the turbocharger (TCR) bearings.
Design/methodology/approach
The simulation was carried out in the ANSYS Fluent software package. The boundary conditions for the calculation were obtained from experimental data. The experiments were carried out at a specialized stand created at the scientific and production association “Turbotekhnika”.
Findings
The result of the simulation was the determination of temperatures and thermal fields in the TCR housing. The data obtained testify to the uneven thermal loading of the bearings. When calculating the dynamics of the rotor, transient modes are considered. The results are the trajectories of the rotor in the space of the bearing clearance. The thickness of the lubricating layer was calculated as a parameter that determines the hydrodynamic friction regime. The thermal state of the TCR elements was evaluated at all the considered rotor speeds. The flexible axis of the rotor was obtained at different speeds.
Originality/value
The paper presents a model of heat transfer in a TCR housing and rotor dynamics, based on numerical methods, which will help in the design of TCRs and journal bearings.
Keywords
Acknowledgements
This paper has been presented at the 10th International Conference on Tribology – BALKANTRIB '20 organised in Belgrade, on May 20–22, 2021. The work was carried out with the financial support of the Russian Foundation for Basic Research (project No. 20–48-740007\20).
Citation
Zadorozhnaya, E., Hudyakov, V., Polyacko, E. and Dolgushin, I. (2022), "Modelling the thermal state of a turbocharger bearing housing when calculating the rotor dynamics at transient modes", Industrial Lubrication and Tribology, Vol. 74 No. 3, pp. 342-349. https://doi.org/10.1108/ILT-06-2021-0215
Publisher
:Emerald Publishing Limited
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