Spray characteristics and liquid distribution of multi-hole effervescent atomisers for industrial burners

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dc.contributor.authorJedelský, Jancs
dc.contributor.authorJícha, Miroslavcs
dc.coverage.issue1cs
dc.coverage.volume96cs
dc.date.issued2016-03-05cs
dc.description.abstractThe present paper provides an experimental study and optimization of multi-hole effervescent atomizers for industrial burners using oil-based fossil, bio- or waste fuels with prospects of emission reduction. Several multi-hole nozzles were designed based on our previous work. We probed the spray quality by Phase-Doppler anemometry. 3-D plots of Sauter mean diameter and mean droplet velocity demonstrate their spatial distribution within the spray. The effect of geometrical and operational factors on the spray is discussed. Droplet size–velocity correlations as well as the size and velocity distributions are presented, and differences are found against other investigations. A spray macrostructure is photographically observed and spray cone angles of the multi-hole nozzles are analysed. An internal two-phase flow is estimated using the Baker’s map for horizontal two-phase flow. Our previous two-phase flow visualizations suggested a liquid–gas gravitational separation when the multi-hole atomizer operated horizontally. This issue is addressed here; the results of spray heterogeneity measurements document that fuel flow rates through individual exit holes differ significantly. This difference spans between 0 and 70% depending on the nozzle design and flow regime. Effervescent sprays are unsteady under some operating conditions; spray unsteadiness was detected at low pressure and low gas-to-liquid-ratios.en
dc.description.abstractTato práce poskytuje experimentální data a optimalizaci víceotvorových trysek pro průmyslové hořáky na fosilní paliva na bázi oleje, bio- nebo odpadních paliva s cílem na snižování emisí.cs
dc.formattextcs
dc.format.extent286-296cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationApplied Thermal Engineering. 2016, vol. 96, issue 1, p. 286-296.en
dc.identifier.doi10.1016/j.applthermaleng.2015.11.079cs
dc.identifier.issn1359-4311cs
dc.identifier.orcid0000-0002-1268-8434cs
dc.identifier.orcid0000-0002-1409-5165cs
dc.identifier.other120495cs
dc.identifier.researcheridA-9224-2013cs
dc.identifier.researcheridCVT-7747-2022cs
dc.identifier.scopus23090535800cs
dc.identifier.scopus6602494673cs
dc.identifier.urihttp://hdl.handle.net/11012/138395
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofApplied Thermal Engineeringcs
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S1359431115013253cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1359-4311/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectDroplet sizeen
dc.subjectEffervescent atomizationen
dc.subjectLiquid–gas separationen
dc.subjectMulti-hole atomizersen
dc.subjectSpray unsteadinessen
dc.subjectTwo-phase flowen
dc.titleSpray characteristics and liquid distribution of multi-hole effervescent atomisers for industrial burnersen
dc.title.alternativeVlastnosti spreje a rozložení tekutiny u víceotvorových trysek pro průmyslové hořákycs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen
sync.item.dbidVAV-120495en
sync.item.dbtypeVAVen
sync.item.insts2024.03.08 17:46:14en
sync.item.modts2024.03.08 17:13:53en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor termomechaniky a techniky prostředícs
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