Empirical correlation for spray half cone angle in plain-jet airblast atomizers

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dc.contributor.authorUrbán, Andráscs
dc.contributor.authorKatona, Bálintcs
dc.contributor.authorMalý, Milancs
dc.contributor.authorJedelský, Jancs
dc.contributor.authorJózsa, Viktorcs
dc.coverage.issue1cs
dc.coverage.volume277cs
dc.date.accessioned2020-08-04T11:02:41Z
dc.date.available2020-08-04T11:02:41Z
dc.date.issued2020-10-01cs
dc.description.abstractPlain-jet airblast atomizers are widely used in industrial applications. The literature contains numerous papers on Sauter mean diameter, however, there is no estimation method available for spray cone angle, SCA, which derivation is the primary goal of this study. Four distinct, practical model liquids were analyzed: distilled water, diesel oil, light heating oil, and crude rapeseed oil. The atomizing pressure and liquid preheating temperature were varied in the range of 0.3–2.4 bar and 25–85 °C, respectively. This latter parameter enabled a wide and continuous liquid kinematic viscosity investigation range of 0.33–44.2 mm2/s. The resulting sprays were imaged at various shutter speeds for proper edge detection. An adaptive thresholding algorithm was developed in Matlab software environment to calculate SCA. The methodology is discussed in detail to facilitate the re-implementation of this technique since there is no generally accepted method for SCA measurement. SCA inversely varied with liquid density and followed a power law with the air-to-liquid mass flow ratio; however, the derived expression also performed well by replacing air-to-liquid mass flow ratio by either Mach number or momentum flux ratio. A simple empirical equation was derived, which allows the estimation of SCA of airblast atomization in a wide parameter range within a 3.5% deviation. The measured results were evaluated in the light of high-speed camera images in the vicinity of the nozzle; it was found that increased liquid jet breakup length decreases SCA while intense ligament formation increases it.en
dc.formattextcs
dc.format.extent1-11cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationFUEL. 2020, vol. 277, issue 1, p. 1-11.en
dc.identifier.doi10.1016/j.fuel.2020.118197cs
dc.identifier.issn0016-2361cs
dc.identifier.other164203cs
dc.identifier.urihttp://hdl.handle.net/11012/193502
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofFUELcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0016236120311935cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0016-2361/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectAirblasten
dc.subjectRapeseed oilen
dc.subjectSpray cone angleen
dc.subjectImage processingen
dc.subjectThresholden
dc.subjectAtomizationen
dc.titleEmpirical correlation for spray half cone angle in plain-jet airblast atomizersen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-164203en
sync.item.dbtypeVAVen
sync.item.insts2020.08.29 08:58:33en
sync.item.modts2020.08.29 08:16:10en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor termomechaniky a techniky prostředícs
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