Pneumatic hammer instability in the aerostatic journal bearing-rotor system: A theoretical and experimental analyses

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dc.authoridKaracay, Tuncay/0000-0002-6014-5610
dc.authoridDal, Abdurrahim/0000-0002-7012-2148
dc.contributor.authorDal, Abdurrahim
dc.contributor.authorKaracay, Tuncay
dc.date.accessioned2025-01-06T17:36:08Z
dc.date.available2025-01-06T17:36:08Z
dc.date.issued2021
dc.description.abstractIn this study, the pneumatic hammer instability phenomena in the aerostatic journal bearing-rotor system is analysed and discussed for different feeding hole configurations theoretically and experimentally. The influences of the configuration of the feeding holes on the nonlinear dynamics of the system are also investigated. The air flow between the surfaces is modelled with Reynold's equation and it is numerically solved with differential transform and finite difference hybrid method. Three different aerostatic bearings are modelled and simulated to investigate the influences of the configuration of the holes for different angular speeds. An experimental test rig is designed and tested for different rotor speeds to validate the obtained numerical results. The dynamic response of the system is analysed using waterfall plots, bifurcation diagrams, orbit plots, phase portrait and Poincare map, which are drawn to determine the pneumatic hammer instability region of the modelled system. The results reveal a nonlinear dynamic response of the rotor centre. In addition, the analysis shows that the feeding hole configuration affects the rotor dynamics and the pneumatic hammer instability region.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [112M847]
dc.description.sponsorshipThe author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) under Grant No. 112M847.
dc.identifier.doi10.1177/1350650120908100
dc.identifier.endpage543
dc.identifier.issn1350-6501
dc.identifier.issn2041-305X
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85081687051
dc.identifier.scopusqualityQ2
dc.identifier.startpage524
dc.identifier.urihttps://doi.org/10.1177/1350650120908100
dc.identifier.urihttps://hdl.handle.net/20.500.14669/1777
dc.identifier.volume235
dc.identifier.wosWOS:000514776400001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSage Publications Ltd
dc.relation.ispartofProceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectAerostatic bearings
dc.subjectnonlinear rotor dynamics
dc.subjectpneumatic hammer instability
dc.titlePneumatic hammer instability in the aerostatic journal bearing-rotor system: A theoretical and experimental analyses
dc.typeArticle

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