Dynamics of a rotor-aerostatic journal bearings system with asymmetric air feeding

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dc.authoridDal, Abdurrahim/0000-0002-7012-2148
dc.authoridKaracay, Tuncay/0000-0002-6014-5610
dc.contributor.authorDal, Abdurrahim
dc.contributor.authorKaracay, Tuncay
dc.date.accessioned2025-01-06T17:36:29Z
dc.date.available2025-01-06T17:36:29Z
dc.date.issued2022
dc.description.abstractIn this study, the effect of the symmetric and asymmetric air feeding on the dynamics of a shaft-aerostatic journal bearing system is theoretically investigated. In this scope, the pressure distribution of the air in the clearance is modeled with Reynold's equation and the lubrication forces are calculated using this distribution. Then, equations of motion derived in four degrees of freedom are solved for different rotational speeds under symmetric and asymmetric air feeding conditions. To validate the simulation results, an experimental test rig comprised of a rotor, air bearings, and measurement equipment is set up and run for different rotational speeds. The nonlinear dynamic behavior of the imbalance responses of the bearing-shaft system is analyzed using bifurcation diagrams, Poincare map, waterfall, and orbit plots. The results of the presented study brought to light that the system has a nonlinear dynamic motion due to a pneumatic hammer. However, the pneumatic hammer frequency of an aerostatic bearing with asymmetric supply pressure condition is lower than an aerostatic bearing with the symmetric condition. And the results also showed that the bearing performance will be improved by asymmetric supply pressure conditions.
dc.description.sponsorshipTurkish Council of Research and Scientific Foundation [112M847]
dc.description.sponsorshipThe present study was supported by Turkish Council of Research and Scientific Foundation under Grant No. 112M847.
dc.identifier.doi10.1007/s40430-022-03601-z
dc.identifier.issn1678-5878
dc.identifier.issn1806-3691
dc.identifier.issue8
dc.identifier.scopus2-s2.0-85133333650
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1007/s40430-022-03601-z
dc.identifier.urihttps://hdl.handle.net/20.500.14669/1902
dc.identifier.volume44
dc.identifier.wosWOS:000820997900002
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Heidelberg
dc.relation.ispartofJournal of The Brazilian Society of Mechanical Sciences and Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectAsymmetric air supply
dc.subjectPneumatic hammer instability
dc.subjectSelf-excited vibration
dc.subjectNonlinear rotor dynamics
dc.subjectAerostatic journal bearings
dc.titleDynamics of a rotor-aerostatic journal bearings system with asymmetric air feeding
dc.typeArticle

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