Labyrinth seal design for space applications

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dc.contributor.authorPouzar, Josefcs
dc.contributor.authorKošťál, Davidcs
dc.contributor.authorWesterberg, Lars-Görancs
dc.contributor.authorNyberg, Erikcs
dc.contributor.authorKřupka, Ivancs
dc.coverage.issue2cs
dc.coverage.volume232cs
dc.date.accessioned2025-03-06T10:53:42Z
dc.date.available2025-03-06T10:53:42Z
dc.date.issued2025-02-14cs
dc.description.abstractLabyrinth seals, extensively used in space applications, serve to prevent the loss of liquid lubricants and shield satellite subsystems from contamination. These seals are essential for the reliable functioning of bearings and for protecting satellite subsystems from contamination. This study compares analytical predictions of lubricant loss against experimental measurements and computer simulations to optimize labyrinth seal configurations. Analytical models tend to overestimate mass loss by 5-8 times compared to experimental data, indicating limited reliability for complex seal geometries. Simulations using MolFlow+ and COMSOL Multiphysics align closely with experimental results, providing accurate mass loss predictions. Key findings highlight that labyrinth length, width, and surface roughness are critical factors in minimizing evaporative mass loss. Notably, stepped labyrinth seals with relief grooves and optimized step positioning effectively reduce molecular beaming effects and improve sealing performance compared to straight geometries. Effective sealing not only reduces mission failures but also helps to minimize space debris, thereby promoting safer satellite missions.en
dc.formattextcs
dc.format.extent1-10cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationVacuum. 2025, vol. 232, issue 2, p. 1-10.en
dc.identifier.doi10.1016/j.vacuum.2024.113882cs
dc.identifier.issn0042-207Xcs
dc.identifier.orcid0000-0003-4993-8529cs
dc.identifier.orcid0000-0003-1351-9373cs
dc.identifier.orcid0000-0002-9936-7480cs
dc.identifier.other197164cs
dc.identifier.researcheridJBR-8798-2023cs
dc.identifier.researcheridF-6941-2012cs
dc.identifier.researcheridD-8147-2012cs
dc.identifier.scopus58682498000cs
dc.identifier.scopus55826337100cs
dc.identifier.urihttps://hdl.handle.net/11012/250091
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofVacuumcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0042207X2400928Xcs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0042-207X/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectVacuum evaporationen
dc.subjectMolecular flowen
dc.subjectLabyrinth sealsen
dc.subjectContaminationen
dc.subjectLiquid lubricantsen
dc.subjectSpace tribologyen
dc.titleLabyrinth seal design for space applicationsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-197164en
sync.item.dbtypeVAVen
sync.item.insts2025.03.06 11:53:42en
sync.item.modts2025.03.06 07:31:59en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav konstruovánícs
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