Modeling of high speed micro rotors in moderate flow
confinement

Dikmen, E. and Hoogt van der, P.J.M. and Aarts, R.G.K.M. (2008) Modeling of high speed micro rotors in moderate flow
confinement. In: Conference proceedings of ISMA2008. The PMA Noise & Vibration research group.

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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
Item Type:	Book Section
Faculty:	Engineering Technology (CTW)
Research Group:	Mechanical Automation and Mechatronics
Link to this item:	http://purl.utwente.nl/publications/79016
Conference URL:	http://www.isma-isaac.be/past/conf/isma2008/
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Modeling of high speed micro rotors in moderate flow confinement

Modeling of high speed micro rotors in moderate flow
confinement