Evaluation of bearing’s cavitation effects on the rotor dynamic behavior
| Autor: | Douglas Jhon Ramos, Gregory Bregion Daniel |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Work (thermodynamics) Bearing (mechanical) Rotor (electric) Applied Mathematics Significant difference 02 engineering and technology Mechanics 01 natural sciences Instability Finite element method law.invention 020303 mechanical engineering & transports 0203 mechanical engineering law Modeling and Simulation Cavitation 0103 physical sciences 010301 acoustics Conservation of mass |
| Zdroj: | Applied Mathematical Modelling. 77:49-65 |
| ISSN: | 0307-904X |
| DOI: | 10.1016/j.apm.2019.07.026 |
| Popis: | This work evaluates the influence of the cavitation effects of hydrodynamic journal bearings on the rotating system dynamic response. Several simulations were performed in order to determine in which operating conditions the cavitation effects become relevant to the rotors dynamic behavior. The rotating system model is constructed by means of the Finite Element Method (FEM), in which the rotor is supported by hydrodynamic journal bearings. Two different approaches were used to model the journal bearing, being Gumbels condition used for analyses without conservation of mass in cavitation and Elrods cavitation algorithm for analyses with conservation of mass. The results show that the inclusion of conservation of mass in cavitation does not lead to significant changes in the rotors dynamic response under normal operating conditions. However, conditions near to the instability threshold show a significant difference in dynamic response, since the model without conservation of mass reaches this limit before the model that includes these effects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect