CFD Simulation of Defogging Effectivity in Automotive Headlamp

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dc.contributor.authorGuzej, Michalcs
dc.contributor.authorZachar, Martincs
dc.coverage.issue13cs
dc.coverage.volume12cs
dc.date.accessioned2020-08-04T11:02:43Z
dc.date.available2020-08-04T11:02:43Z
dc.date.issued2019-07-01cs
dc.description.abstractIn the past decade, the condensation of internal air humidity in automotive headlamps has become more prevalent than ever due to the increased usage of a new light source—LEDs. LEDs emit far less heat than previously-used halogen lamps, which makes them far more susceptible to fogging. This fogging occurs when the internal parts of the headlamp fall to a temperature below the dew point. The front glass is most vulnerable to condensation due to its direct exposure to ambient conditions. Headlamp fogging leads to a decrease in performance and the possibility of malfunctions, which has an impact not only on the functional aspect of the product’s use but also on traffic safety. There are currently several technical solutions available which can determine the effectivity of ventilation systems applied for headlamp defogging. Another approach to this problem may be to use a numerical simulation. This paper proposes a CFD (computational fluid dynamics) simulation with a slightly simplified 3D model of an actual headlamp, which allows simulation of all the phenomena closely connected with fluid flow and phase change. The results were validated by real experiments on a special fogging–defogging test rig. This paper compares three different simulations and their compliance with real experiments.en
dc.formattextcs
dc.format.extent1-18cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationENERGIES. 2019, vol. 12, issue 13, p. 1-18.en
dc.identifier.doi10.3390/en12132609cs
dc.identifier.issn1996-1073cs
dc.identifier.other157610cs
dc.identifier.urihttp://hdl.handle.net/11012/180465
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofENERGIEScs
dc.relation.urihttps://www.mdpi.com/1996-1073/12/13/2609cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1073/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectheadlampen
dc.subjectfoggingen
dc.subjectdefoggingen
dc.subjectCFDen
dc.subjectcondensationen
dc.subjectdew pointen
dc.titleCFD Simulation of Defogging Effectivity in Automotive Headlampen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-157610en
sync.item.dbtypeVAVen
sync.item.insts2020.08.04 13:02:43en
sync.item.modts2020.08.04 12:21:36en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Laboratoř přenosu tepla a prouděnícs
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