Spraying of viscous liquids: influence of the fluids mixing mechanism on the performance of the internal-mixing twin fluid atomizers

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dc.contributor.authorMlkvik, Marekcs
dc.contributor.authorJedelský, Jancs
dc.contributor.authorKarbstein, Heike P.cs
dc.contributor.authorGaukel, Volkercs
dc.coverage.issue15cs
dc.coverage.volume10cs
dc.date.issued2020-07-30cs
dc.description.abstractThe thermal usage of liquid fuels implies their combustion, which is a process strongly influenced by the performance of the atomizer, which disrupts the fuel into drops of the required sizes. The spray quality of the twin-fluid atomizers with internal mixing (IM-TFA) is primarily influenced by the two-phase flow pattern inside the mixing chamber. We studied the performance of the four types of the IM-TFA nozzles by the optical diffraction system (Malvern Spraytec) to answer the question of how the mixing chamber design influences the spray quality at low atomizing gas consumption. We tested the effervescent atomizer in outside-in-liquid (OIL) and outside-in-gas (OIG) configurations, the Y-jet nozzle and new nozzle design, and the CFT atomizer when spraying model liquids with the viscosities comparable to the common fuels (mu=60and143mPa center dot s). We found that the effervescent atomizer performance was strongly influenced by the configuration of the inlet ports. Although the OIL configuration provided the best spray quality (D32= 72 mu m), with the highest efficiency (0.16%), the OIG nozzle was characterized by unstable work and poor spray quality. Both the devices were sensitive to liquid viscosity. The Y-jet nozzle provided a stable performance over the liquid viscosity spectrum, but the spray quality and efficiency were lower than for the OIL nozzle. Our findings can be used to improve the performance of the common IM-TFA types or to design new atomizers. The results also provide an overview of the tested atomizers' performances over the wide range of working conditions and, thus, help to define the application potential of the tested nozzle designs.en
dc.formattextcs
dc.format.extent1-17cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationApplied Sciences - Basel. 2020, vol. 10, issue 15, p. 1-17.en
dc.identifier.doi10.3390/app10155249cs
dc.identifier.issn2076-3417cs
dc.identifier.orcid0000-0002-1268-8434cs
dc.identifier.other168014cs
dc.identifier.researcheridA-9224-2013cs
dc.identifier.scopus23090535800cs
dc.identifier.urihttp://hdl.handle.net/11012/195907
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofApplied Sciences - Baselcs
dc.relation.urihttps://www.mdpi.com/2076-3417/10/15/5249cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2076-3417/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectTwin-fluid atomizeren
dc.subjectTwo-phase flowen
dc.subjectAtomizationen
dc.subjectSpray imaginingen
dc.subjectComparison of atomizersen
dc.subjectSpraying efficiencyen
dc.subjectDroplet size correlationsen
dc.titleSpraying of viscous liquids: influence of the fluids mixing mechanism on the performance of the internal-mixing twin fluid atomizersen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-168014en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:47:13en
sync.item.modts2025.01.17 19:33:23en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor termomechaniky a techniky prostředícs
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