Dynamics of Rotating Systems Focused on Industrial Applications

Abstract

This paper introduces the specific issues of dynamic behaviour and the possibilities of computational modelling in rotating systems. Initially, it revisits the basic properties of rotating systems supported by journal bearings. Subsequently, it explores the instabilities associated with various types of journal bearings. Three intriguing industrial applications are then presented. The first application explores the nonlinear dynamics of high-speed turbochargers, focusing on their specific floating ring bearings. Computational results are compared with experimentally obtained data for validation. Conversely, the second application concerns the dynamics of large turbine rotors used in power plants. Particular attention is given to addressing challenges related to stator and foundation considerations in computational models. Lastly, the third application aims to model a specific vertical rotor immersed in fluid and operating under extreme temperatures.