On the stabilising effect of gyroscopic moments in an automotive turbocharger
dc.contributor.author | Kamesh, Punithavathy | |
dc.contributor.author | Brennan, Michael J. [UNESP] | |
dc.contributor.author | Holmes, Roy | |
dc.contributor.institution | Univ Southampton | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T13:29:24Z | |
dc.date.available | 2014-05-20T13:29:24Z | |
dc.date.issued | 2012-01-01 | |
dc.description.abstract | Automotive turbochargers, which operate at very high speeds, exceeding 180,000 r/min, exhibit two strong sub-harmonic modes of vibrations due to oil-whirl instability. These are a conical mode and an in-phase whirl mode. The gyroscopic effects can be very important in such a rotor system. This article presents a theoretical investigation into these effects on the conical whirl instability of a turbocharger induced by the angular (tilting) motion of a rigid rotor. A simplified linear model is used to analyse the rotor-bearing system by investigating the effects of the gyroscopic moment on the internal moments. A gyroscopic coefficient, defined by the geometry of the rotor, is shown to govern the stability of the conical whirl motion. A threshold value of 1/2 is determined for this coefficient to suppress the conical whirl. This value remains unaffected if the rotor is asymmetric and is supported by floating ring bearings, which is the case in a practical turbocharger. | en |
dc.description.affiliation | Univ Southampton, Inst Sound & Vibrat Res, Southampton S017 1BJ, Hants, England | |
dc.description.affiliation | Univ Southampton, Sch Engn Sci, Southampton S017 1BJ, Hants, England | |
dc.description.affiliation | UNESP, Dept Engn Mecan, Ilha Solteira, Brazil | |
dc.description.affiliationUnesp | UNESP, Dept Engn Mecan, Ilha Solteira, Brazil | |
dc.description.sponsorship | Institute of Sound and Vibration Research, University of Southampton, UK | |
dc.format.extent | 2485-2495 | |
dc.identifier | http://dx.doi.org/10.1177/0954406212438142 | |
dc.identifier.citation | Proceedings of The Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Science. London: Sage Publications Ltd, v. 226, n. C10, p. 2485-2495, 2012. | |
dc.identifier.doi | 10.1177/0954406212438142 | |
dc.identifier.issn | 0954-4062 | |
dc.identifier.uri | http://hdl.handle.net/11449/9912 | |
dc.identifier.wos | WOS:000309206200009 | |
dc.language.iso | eng | |
dc.publisher | Sage Publications Ltd | |
dc.relation.ispartof | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science | |
dc.relation.ispartofjcr | 0.996 | |
dc.relation.ispartofsjr | 0,436 | |
dc.rights.accessRights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | Gyroscopic effect | en |
dc.subject | linear analysis | en |
dc.subject | turbocharger | en |
dc.subject | conical whirl instability | en |
dc.title | On the stabilising effect of gyroscopic moments in an automotive turbocharger | en |
dc.type | Artigo | |
dcterms.license | http://www.uk.sagepub.com/aboutus/openaccess.htm | |
dcterms.rightsHolder | Sage Publications Ltd | |
unesp.campus | Universidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteira | pt |
unesp.department | Engenharia Mecânica - FEIS | pt |
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