Please use this identifier to cite or link to this item: http://dx.doi.org/10.25673/85973
Title: Influence of lubricant film cavitation on the rotor dynamic system behaviour of an exhaust gas turbocharger rotor
Author(s): Ziese, Christian
Irmscher, Cornelius
Woschke, ElmarLook up in the Integrated Authority File of the German National Library
Issue Date: 2021
Type: Article
Language: English
URN: urn:nbn:de:gbv:ma9:1-1981185920-879267
Subjects: lubricant film cavitation
Rotor dynamic system
Gas turbocharger rotor
Abstract: The vibration behaviour of fast rotating rotors is significantly influenced by the bearing properties. Lubricant film induced excitations can cause sub-synchronous rotor oscillations known as oil-whirl and oil-whip phenomena. The non-linear bearing properties depend primarily on the lubricant properties, kinematics of bearing partners and especially on the occurrence of cavitation. Outgassing processes lead to a two-phase flow consisting of gas and oil, which can influence the bearing stiffness and damping respectively and consequently the rotor response behaviour. In this contribution, the oscillations of a semifloating ring supported turbocharger rotor are investigated under the influence of lubricant film cavitation. For this purpose, run-up simulations are carried out under the assumption of mass-conserving cavitation according to the two-phase model and compared with measurements. In order to illustrate the influence of outgassing processes, a comparison is made with non-mass-conserving cavitation theory according to the assumptions of Half-Sommerfeld.
URI: https://opendata.uni-halle.de//handle/1981185920/87926
http://dx.doi.org/10.25673/85973
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Sponsor/Funder: Projekt DEAL 2020
Journal Title: Proceedings in applied mathematics and mechanics
Publisher: Wiley-VCH
Publisher Place: Weinheim [u.a.]
Volume: 20
Issue: 1
Original Publication: 10.1002/pamm.202000053
Page Start: 1
Page End: 2
Appears in Collections:Fakultät für Maschinenbau (OA)

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