Explanation of the mechanisms of unsteady gas flow through the turbocharger seal system, including thermal and structural interactions

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dc.contributor.authorNovotný, Pavelcs
dc.contributor.authorKudláček, Petrcs
dc.contributor.authorVacula, Jiřícs
dc.coverage.issue2cs
dc.coverage.volume12cs
dc.date.accessioned2023-07-24T11:00:18Z
dc.date.available2023-07-24T11:00:18Z
dc.date.issued2023-07-15cs
dc.description.abstractGas flow in the seal system can be expected during the operation of a turbocharger and is associated with negative effects on the quality of the lubricant or turbocharger efficiency. Gas flow also affects particulate matter production due to lubricant entrainment in the compressor or turbine. The prediction of gas flow rates depends on many design parameters and the operating conditions of the turbocharger, but sufficiently accurate descriptions of the gas flow mechanisms and their quantification depending on the operating conditions have not yet been presented. The proposed computational approach simultaneously solves the gas dynamics in the seal system, the heat transfer in the turbocharger rotor-bearing system and the dynamics of the seal rings and rotor, including the bearings. The computational model for the turbocharger of a heavy-duty vehicle engine is experimentally validated. Two mechanisms have major influences on gas mass flow: the gas flow through the thin gap between the moving ring and groove and the flow through the ring gap. The results show that the importance of these mechanisms depends on several geometrical dimensions of the seal system and the operating conditions of the turbocharger, with a strong connection to the rotor dynamics and thermal load of the impellers. Influences involving rotor movement or rotor thermal conditions are crucial, and their non-inclusion limits the ability to correctly predict gas mass flow.en
dc.formattextcs
dc.format.extent180-198cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPropulsion and Power Research. 2023, vol. 12, issue 2, p. 180-198.en
dc.identifier.doi10.1016/j.jppr.2023.05.003cs
dc.identifier.issn2212-540Xcs
dc.identifier.orcid0000-0002-7513-2345cs
dc.identifier.orcid0000-0002-8291-1734cs
dc.identifier.orcid0000-0001-9026-3557cs
dc.identifier.other184180cs
dc.identifier.researcheridP-8188-2015cs
dc.identifier.scopus57032004000cs
dc.identifier.urihttp://hdl.handle.net/11012/213608
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofPropulsion and Power Researchcs
dc.relation.urihttps://doi.org/10.1016/j.jppr.2023.05.003cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2212-540X/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectGas blow-byen
dc.subjectGas flowen
dc.subjectHeat transferen
dc.subjectRotor dynamicsen
dc.subjectTurbochargeren
dc.subjectSeal systemen
dc.titleExplanation of the mechanisms of unsteady gas flow through the turbocharger seal system, including thermal and structural interactionsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-184180en
sync.item.dbtypeVAVen
sync.item.insts2023.08.14 16:59:39en
sync.item.modts2023.08.14 16:19:39en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. ÚADI-odbor pohonných jednotekcs
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