Modeling of high speed micro rotors in moderate flow confinement

E. Dikmen, Peter van der Hoogt, Ronald G.K.M. Aarts

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Abstract

The recent developments in high speed micro rotating machinery lead to the need for multiphysical modeling of the rotor and the surrounding medium. In this study, thermal and flow induced effects on rotor dynamics of geometries with moderate flow confinement are studied. The structure is modeled via finite elements based on Timoshenko beams. Flow induced forces are implemented to the structure as added mass, stiffness and damping at each node. The temperature increase in the air gap, resulting from air friction is modeled via thermal networks in steady state as a function of rotation speed. The changed temperature affects the air properties and therefore the flow induced forces have to be recalculated. In this way, thermal and fluid effects in medium gap confinements are coupled with the rotordynamic model and their effects on critical speeds and vibration response can be investigated
Original languageEnglish
Title of host publicationProceedings of ISMA2008
Subtitle of host publicationInternational Conference on Noise and Vibration Engineering
EditorsP. Sas, B. Bergen
Place of PublicationLeuven
PublisherKatholieke Universiteit Leuven
Pages1055-1062
ISBN (Print)978 9073802865
Publication statusPublished - 2008
Event2008 International Conference on Noise and Vibration Engineering, ISMA 2008 - Leuven, Belgium
Duration: 15 Sep 200817 Sep 2008
http://past.isma-isaac.be/isma2008

Conference

Conference2008 International Conference on Noise and Vibration Engineering, ISMA 2008
Abbreviated titleISMA
CountryBelgium
CityLeuven
Period15/09/0817/09/08
Internet address

Keywords

  • METIS-255812
  • IR-79016

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