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Study on the temperature and strain fields in gas foil bearings – measurement method and numerical simulations
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AGH University of Science and Technology, Department of Robotics and Mechatronics, al. A. Mickiewicza 30, 30-059 Kraków, Poland
Publication date: 2021-09-30
Eksploatacja i Niezawodność – Maintenance and Reliability 2021;23(3):540–547
  • A method for measurement of the temperature and strain fields in the bearing’s top foil making use of its specialized version equipped with sensors of the adequate physical quantities has been proposed.
  • A numerical model of a gas foil bearing has been developed using the Finite Element Method, which takes into account thermomechanical couplings.
  • The obtained results of numerical calculations have indicated the dominant directions of strains as well as temperature distribution in the bearing
Gas foil bearings belong to the group of slide bearings and are used in devices in which operation at high rotational speeds of the shafts are of key importance, e.g., in gas turbines. The air film developed on the surface of the bearing’s top foil allows this structural component to be separated from the shaft. This ensures a non-contact operation of the bearing. In the case of the mentioned type of bearings, their resultant operational properties are influenced by both thermal and mechanical phenomena. The current work presents a model of a gas foil bearing developed making use of the Finite Element Method. The model takes into account thermomechanical couplings which are necessary for the correct simulation of the operation of physical components of the modeled system. The paper reports the results of numerical analyzes conducted for the elaborated model as well as the relevant conclusions concerning thermomechanical couplings present in gas foil bearings. The method for the experimental identification of the temperature and strain fields in the bearing’s top foil proposed to validate the numerical model is also presented.
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