Effect of Fabrication Method and Surface Roughness on Spray Characteristics for Small Pressure-Swirl Atomizers

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dc.contributor.authorJedelský, Jancs
dc.contributor.authorMalý, Milancs
dc.contributor.authorBělka, Miloslavcs
dc.contributor.authorPolzer, Alešcs
dc.contributor.authorSámelová, Vendulacs
dc.contributor.authorCejpek, Ondřejcs
dc.contributor.authorWigley, Grahamcs
dc.coverage.issue1cs
dc.coverage.volume85cs
dc.date.issued2023-01-06cs
dc.description.abstractThe paper investigates the effect of the fabrication method, precision and surface roughness on atomization nozzle performance. A comprehensive review of the available knowledge on the topic is an integral part and an indispensable prerequisite of the study. It focuses on the requirements for atomizing nozzles and their production from the point of view of surface quality, dimensional and shape accuracy. The published results on the influence of surface quality and roughness on internal flow and atomizer performance are discussed. Available atomizer manufacturing techniques are reviewed with a focus on Rapid prototyping methods, accuracy and geometrical imperfections. Classical Machining and two 3D printing techniques were applied to produce small pressure-swirl atomizers. They were fabricated in a number of versions. The machined nozzles featured several specific defects. Spray quality measurements of these atomizers, at selected operation regimes, were made on a cold test bench using PDA and mechanical patternation to evaluate discharge coefficient (CD), Sauter mean diameter, spray cone angle, nozzle efficiency (eta n), breakup length and liquid distribution in the spray. The results show the important and systematic effects of surface quality and manufacturing imperfections on the atomizer characteristics. The exit orifice imperfections harm the circumferential uniformity and other spray characteristics. The effect becomes significant when the exit orifice shifted out of the nozzle axis by >2 % of the chamber diameter, and the orifice edge is chamfered by >20 % of the orifice length. The swirl chamber surface modified by scratches has a minor effect. Replacement of machining with current commercial 3D printing techniques, namely Selective laser melting and PolyJet technique, is associated with increased surface roughness. It worsens spray quality, liquid distri-bution uniformity and eta n and increases the CD when relative surface roughness exceeds 0.007. The result presentation using dimensionless criteria allows for generalisation of the outcomes to other atomizer types and scales.en
dc.formattextcs
dc.format.extent166-178cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of Manufacturing Processes. 2023, vol. 85, issue 1, p. 166-178.en
dc.identifier.doi10.1016/j.jmapro.2022.11.031cs
dc.identifier.issn2212-4616cs
dc.identifier.orcid0000-0002-1268-8434cs
dc.identifier.orcid0000-0002-1193-519Xcs
dc.identifier.orcid0000-0001-8905-9751cs
dc.identifier.orcid0000-0001-8124-803Xcs
dc.identifier.orcid0000-0001-7372-8981cs
dc.identifier.orcid0000-0002-7854-9533cs
dc.identifier.other180671cs
dc.identifier.researcheridA-9224-2013cs
dc.identifier.researcheridAAY-7288-2021cs
dc.identifier.researcheridJ-9034-2016cs
dc.identifier.researcheridLWI-7262-2024cs
dc.identifier.scopus23090535800cs
dc.identifier.scopus57189715785cs
dc.identifier.scopus37041533500cs
dc.identifier.urihttp://hdl.handle.net/11012/244294
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofJournal of Manufacturing Processescs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S1526612522008076?via%3Dihubcs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2212-4616/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectPressure-swirl atomizeren
dc.subjectSpray qualityen
dc.subjectManufacturing precisionen
dc.subjectFabrication methoden
dc.subjectSurface qualityen
dc.subjectAdditive manufacturingen
dc.titleEffect of Fabrication Method and Surface Roughness on Spray Characteristics for Small Pressure-Swirl Atomizersen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen
sync.item.dbidVAV-180671en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:47:16en
sync.item.modts2025.01.17 15:15:46en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor termomechaniky a techniky prostředícs
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