Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation
The vibration behaviour of turbocharger rotors is influenced by the acting loads as well as by the type and arrangement of the hydrodynamic bearings and their operating condition. Due to the highly non-linear bearing behaviour, lubricant film-induced excitations can occur, which lead to sub-synchron...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-04-01
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| Series: | Lubricants |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4442/9/4/44 |
| _version_ | 1797537424411197440 |
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| author | Christian Ziese Cornelius Irmscher Steffen Nitzschke Christian Daniel Elmar Woschke |
| author_facet | Christian Ziese Cornelius Irmscher Steffen Nitzschke Christian Daniel Elmar Woschke |
| author_sort | Christian Ziese |
| collection | DOAJ |
| description | The vibration behaviour of turbocharger rotors is influenced by the acting loads as well as by the type and arrangement of the hydrodynamic bearings and their operating condition. Due to the highly non-linear bearing behaviour, lubricant film-induced excitations can occur, which lead to sub-synchronous rotor vibrations. A significant impact on the oscillation behaviour is attributed to the pressure distribution in the hydrodynamic bearings, which is influenced by the thermo-hydrodynamic conditions and the occurrence of outgassing processes. This contribution investigates the vibration behaviour of a floating ring supported turbocharger rotor. For detailed modelling of the bearings, the Reynolds equation with mass-conserving cavitation, the three-dimensional energy equation and the heat conduction equation are solved. To examine the impact of outgassing processes and thrust bearing on the occurrence of sub-synchronous rotor vibrations separately, a variation of the bearing model is made. This includes run-up simulations considering or neglecting thrust bearings and two-phase flow in the lubrication gap. It is shown that, for a reliable prediction of sub-synchronous vibrations, both the modelling of outgassing processes in hydrodynamic bearings and the consideration of thrust bearing are necessary. |
| first_indexed | 2024-03-10T12:15:56Z |
| format | Article |
| id | doaj.art-f4f0457065794b42bebc6adbd50a6a17 |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-03-10T12:15:56Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-f4f0457065794b42bebc6adbd50a6a172023-11-21T15:55:14ZengMDPI AGLubricants2075-44422021-04-01944410.3390/lubricants9040044Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving CavitationChristian Ziese0Cornelius Irmscher1Steffen Nitzschke2Christian Daniel3Elmar Woschke4Institute of Mechanics, Otto von Guericke University Magdeburg, 39106 Magdeburg, GermanyInstitute of Mechanics, Otto von Guericke University Magdeburg, 39106 Magdeburg, GermanyInstitute of Mechanics, Otto von Guericke University Magdeburg, 39106 Magdeburg, GermanyInstitute of Mechanics, Otto von Guericke University Magdeburg, 39106 Magdeburg, GermanyInstitute of Mechanics, Otto von Guericke University Magdeburg, 39106 Magdeburg, GermanyThe vibration behaviour of turbocharger rotors is influenced by the acting loads as well as by the type and arrangement of the hydrodynamic bearings and their operating condition. Due to the highly non-linear bearing behaviour, lubricant film-induced excitations can occur, which lead to sub-synchronous rotor vibrations. A significant impact on the oscillation behaviour is attributed to the pressure distribution in the hydrodynamic bearings, which is influenced by the thermo-hydrodynamic conditions and the occurrence of outgassing processes. This contribution investigates the vibration behaviour of a floating ring supported turbocharger rotor. For detailed modelling of the bearings, the Reynolds equation with mass-conserving cavitation, the three-dimensional energy equation and the heat conduction equation are solved. To examine the impact of outgassing processes and thrust bearing on the occurrence of sub-synchronous rotor vibrations separately, a variation of the bearing model is made. This includes run-up simulations considering or neglecting thrust bearings and two-phase flow in the lubrication gap. It is shown that, for a reliable prediction of sub-synchronous vibrations, both the modelling of outgassing processes in hydrodynamic bearings and the consideration of thrust bearing are necessary.https://www.mdpi.com/2075-4442/9/4/44run-up simulationsemi-floating ring bearingthrust bearingtwo-phase flow cavitationoil-whirl and oil-whip |
| spellingShingle | Christian Ziese Cornelius Irmscher Steffen Nitzschke Christian Daniel Elmar Woschke Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation Lubricants run-up simulation semi-floating ring bearing thrust bearing two-phase flow cavitation oil-whirl and oil-whip |
| title | Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation |
| title_full | Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation |
| title_fullStr | Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation |
| title_full_unstemmed | Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation |
| title_short | Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation |
| title_sort | run up simulation of a semi floating ring supported turbocharger rotor considering thrust bearing and mass conserving cavitation |
| topic | run-up simulation semi-floating ring bearing thrust bearing two-phase flow cavitation oil-whirl and oil-whip |
| url | https://www.mdpi.com/2075-4442/9/4/44 |
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