Schlieren analysis of non-MILD distributed combustion in a mixture temperature-controlled burner

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dc.contributor.authorJózsa, Viktorcs
dc.contributor.authorMalý, Milancs
dc.contributor.authorFüzesi, Dánielcs
dc.contributor.authorRácz, Erikacs
dc.contributor.authorKardos, Réka Annacs
dc.contributor.authorJedelský, Jancs
dc.coverage.issue1cs
dc.coverage.volume273cs
dc.date.accessioned2023-07-24T06:03:42Z
dc.date.available2023-07-24T06:03:42Z
dc.date.issued2023-06-15cs
dc.description.abstractIt was recently demonstrated that distributed combustion is accessible outside the MILD combustion regime without needing inner or outer flue gas recirculation. The Mixture-Temperature Controlled combustion concept, which made it possible, offers excellent flame stability besides ultra-low emission. This concept is investigated presently to reveal the qualitative characteristics of the cold discharging mixture jet from the burner and its ignition. The Schlieren technique with a high-speed camera is the most suitable approach for this purpose, revealing the line-of-sight density gradients. Nine cases were evaluated, utilizing natural gas and diesel fuel, various equivalence ratios, and atomizing pressures. V-shaped flames were used as a baseline for comparing distributed combustion to it via direct images and velocity field using the PIVlab Matlab application. The results confirm the previous hypothesis that distributed combustion features a cold fuel-air mixture at the burner discharge that ignites downstream. The excellent flame stability comes from the fishbone-tiled coherent structures with significant random features, resulting in no characteristic frequency related to the flame. All these results comply with the previous findings by chemiluminescence emission and acoustic signal of distributed combustion, which techniques cannot be used to investigate the flame structure, unlike Schlieren imaging.en
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationEnergy. 2023, vol. 273, issue 1, p. 1-12.en
dc.identifier.doi10.1016/j.energy.2023.127230cs
dc.identifier.issn0360-5442cs
dc.identifier.orcidAAY-7288-2021cs
dc.identifier.orcidA-9224-2013cs
dc.identifier.other183162cs
dc.identifier.researcherid0000-0002-1193-519Xcs
dc.identifier.researcherid0000-0002-1268-8434cs
dc.identifier.scopus57189715785cs
dc.identifier.scopus23090535800cs
dc.identifier.urihttp://hdl.handle.net/11012/213602
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofEnergycs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0360544223006242cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0360-5442/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectTurbulenten
dc.subjectBurneren
dc.subjectSwirlen
dc.subjectCombustionen
dc.subjectSchlierenen
dc.subjectDistributeden
dc.titleSchlieren analysis of non-MILD distributed combustion in a mixture temperature-controlled burneren
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-183162en
sync.item.dbtypeVAVen
sync.item.insts2023.07.24 08:03:42en
sync.item.modts2023.07.21 16:15:07en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor termomechaniky a techniky prostředícs
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