Application of Regularised Cavitation Algorithm for Transient Analysis of Rotors Supported in Floating Ring Bearings

  • Steffen NitzschkeEmail author
  • Elmar Woschke
  • Christian Daniel
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 63)


In order to analyse the dynamical behaviour of fast-rotating, lightly loaded rotors with floating ring bearings, which mainly occur in turbochargers, a suitable simulation method is required. For that purpose, an online solution of the Reynolds differential equation within a transient rotor dynamic simulation is applied. In addition to the hydraulic coupling of inner and outer lubrication film in the floating ring bearing, a mass-preserving cavitation model is introduced. Therefore, the algorithm of Elrod is adopted by use of a regularisation scheme in the differential equation in order to eliminate the originally occurring numerical problems under transient loads. The developed program is validated based on data available in the literature, as well as on the basis of test rig measurements for a passenger car turbocharger. Finally, the achievable result quality is examined in relation to the computational cost under successive reduction of the hydrodynamic modeling depth.


Turbocharger Floating ring bearing Elrod Cavitation Regularisation Rotor dynamics 



The results were generated in the framework of the project WO 2085/2 “Numerische Analyse des transienten Verhaltens dynamisch belasteter Rotorsysteme in Gleit- und Schwimmbuchsenlagern unter Berücksichtigung kavitativer Effekte”, which is supported by the DFG (Deutsche Forschungsgemeinschaft/German Research Foundation). This support is gratefully acknowledged.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Steffen Nitzschke
    • 1
    Email author
  • Elmar Woschke
    • 1
  • Christian Daniel
    • 1
  1. 1.Otto-von-Guericke-UniversityMagdeburgGermany

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