Experimental validation of the operation of tilting-pad journal bearing lubricated by high-test peroxide under excessive vibrations and reduced flow of the lubricant

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dc.contributor.authorPokorný, Jancs
dc.contributor.authorNávrat, Tomášcs
dc.contributor.authorVajdák, Michalcs
dc.contributor.authorOtevřel, Marekcs
dc.contributor.authorKozák, Jiřícs
dc.coverage.issue6cs
dc.coverage.volume523cs
dc.date.issued2023-03-22cs
dc.description.abstractHydrogen peroxide is commonly used as a low-toxicity liquid rocket propellant (oxidizer). Hydrodynamic bearings lubricated by this propellant may be applicable in rocket engine pumps. In this paper, a hydrodynamic tilting-pad journal bearing lubricated by highly concentrated (87wt%) hydrogen peroxide was proposed. Furthermore, an experimental validation of the performance of this bearing with pads made of PEEK material (polyetheretherketone) was carried out on the developed high-speed measuring device. To verify the endurance of this bearing, measurements were performed at different peroxide flow rates from 100% to 20% of the nominal flow rate. The tests were also conducted under excessive vibrations induced by the misalignment of the test rotor with the drive connected by a flexible coupling. In addition to vibration measurement, the wear of the bearing sliding surfaces and lubricant temperature variations were evaluated. The measured results were compared with the calculated data. For this purpose, a two-dimensional computational model based on the thermo-elasto-hydrodynamic lubrication theory was presented. To improve the solution convergence, Newton's method was used to calculate the equilibrium tilt of the pads. The involved bearings operated smoothly at the mentioned misalignment even at 20% peroxide flow, only slight foaming occurred at the outlet.en
dc.formattextcs
dc.format.extent13cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationWEAR. 2023, vol. 523, issue 6, 13 p.en
dc.identifier.doi10.1016/j.wear.2023.204801cs
dc.identifier.issn0043-1648cs
dc.identifier.orcid0000-0002-6613-4672cs
dc.identifier.orcid0000-0003-2772-3551cs
dc.identifier.other183512cs
dc.identifier.researcheridAAA-6114-2021cs
dc.identifier.researcheridQ-4147-2017cs
dc.identifier.scopus57219197277cs
dc.identifier.scopus15042816200cs
dc.identifier.urihttp://hdl.handle.net/11012/209502
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofWEARcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0043164823001849cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0043-1648/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectHydrogen peroxideen
dc.subjectTilting pad journal bearingen
dc.subjectMeasurementen
dc.subjectExtreme conditionsen
dc.titleExperimental validation of the operation of tilting-pad journal bearing lubricated by high-test peroxide under excessive vibrations and reduced flow of the lubricanten
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.grantNumberinfo:eu-repo/grantAgreement/TA0/TK/TK04030262cs
sync.item.dbidVAV-183512en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:49:18en
sync.item.modts2025.01.17 15:26:04en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav mechaniky těles, mechatroniky a biomechanikycs
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