Searching for a Numerical Model for Prediction of Pressure-Swirl Atomizer Internal Flow

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dc.contributor.authorMalý, Milancs
dc.contributor.authorSláma, Jaroslavcs
dc.contributor.authorCejpek, Ondřejcs
dc.contributor.authorJedelský, Jancs
dc.coverage.issue13cs
dc.coverage.volume12cs
dc.date.accessioned2022-07-01T06:52:32Z
dc.date.available2022-07-01T06:52:32Z
dc.date.issued2022-06-22cs
dc.description.abstractNumerical prediction of discharge parameters allows design of a pressure-swirl atomizer in a fast and cheap manner, yet it must provide reliable results for a wide range of geometries and operating regimes. Many authors have used different numerical setups for similar cases and often concluded opposite suggestions on numerical setup. This paper compares 2D (two-dimensional) axisymmetric, 3D (three-dimensional) periodic and full 3D numerical models used for estimation of the internal flow characteristics of a pressure-swirl atomizer. The computed results are compared with experimental data in terms of spray cone angle, discharge coefficient (C-D), internal air-core dimensions, and velocity profiles. The three-component velocity was experimentally measured using a Laser Doppler Anemometry in a scaled transparent model of the atomizer. The internal air-core was visualized by a high-speed camera with backlit illumination. Tested conditions covered a wide range of the Reynolds numbers within the inlet ports, Re = 1000, 2000, 4000. The flow was treated as both steady and transient flow. The numerical solver used laminar and several turbulence models, represented by k-epsilon and k-omega models, Reynolds Stress model (RSM) and Large Eddy Simulation (LES). The laminar solver was capable of closely predicting the C-D, air-core dimensions and velocity profiles compared with the experimental results in both 2D and 3D simulations. The LES performed similarly to the laminar solver for low Re and was slightly superior for Re = 4000. The two-equation models were sensitive to proper solving of the near wall flow and were not accurate for low Re. Surprisingly, the RSM produced the worst results.en
dc.formattextcs
dc.format.extent1-18cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationApplied Sciences - Basel. 2022, vol. 12, issue 13, p. 1-18.en
dc.identifier.doi10.3390/app12136357cs
dc.identifier.issn2076-3417cs
dc.identifier.other178339cs
dc.identifier.urihttp://hdl.handle.net/11012/208141
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofApplied Sciences - Baselcs
dc.relation.urihttps://www.mdpi.com/2076-3417/12/13/6357cs
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.subjectpressure-swirlen
dc.subjectinternal flowen
dc.subjectlaminaren
dc.subjectCFDen
dc.subjectLDAen
dc.subjectLESen
dc.subjecttwo-phaseen
dc.subjectvelocityen
dc.titleSearching for a Numerical Model for Prediction of Pressure-Swirl Atomizer Internal Flowen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-178339en
sync.item.dbtypeVAVen
sync.item.insts2023.02.10 16:53:17en
sync.item.modts2023.02.10 16:14:24en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor termomechaniky a techniky prostředícs
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