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Computational Study of Deflagration-to-Detonation Transition in a Semi-Confined Slit Combustor

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dc.contributor.authorIvanov, V. S.
dc.contributor.authorShamshin, I. O.
dc.contributor.authorFrolov, S. M.
dc.contributor.authorФролов, Сергей Михайлович
dc.date.accessioned2024-12-27T11:04:46Z
dc.date.available2024-12-27T11:04:46Z
dc.date.issued2023
dc.description.abstractSystematic three-dimensional numerical simulations of flame acceleration and deflagration-to-detonation transition (DDT) in a semi-confined flat slit combustor are performed. The combustor is assumed to be partly filled with the stoichiometric ethylene–oxygen mixture at normal pressure and temperature conditions. The objective of the study is to reveal the conditions for DDT in terms of the minimum height of the combustible mixture layer in the slit, the maximum dilution of the mixture with nitrogen and the maximum slit width. The results of the calculations are compared with the available experimental data. The calculation results are shown to agree satisfactorily with the experimental data on the slit-filling dynamics, flame structure, the occurrence of the preflame self-ignition center, DDT, and detonation propagation. DDT occurs in the layer at a time instant when the flame accelerates to a velocity close to 750 m/s. DDT occurs near the slit bottom due to the formation of the self-ignition center ahead of the leading edge of the flame as a result of shock wave reflections from the walls of injector holes at the slit bottom and from the corners of the conjugation of the slit bottom and side walls. The decrease in the height of the mixture layer, the dilution of the mixture with nitrogen, and the increase in the slit width are shown to slow down flame acceleration in the slit and increase the DDT run-up distance and time until DDT failure. The obtained results are important for determining the conditions for mild initiation of detonation via DDT in semi-confined annular RDE combustors.
dc.identifier.citationIvanov, V. S. Computational Study of Deflagration-to-Detonation Transition in a Semi-Confined Slit Combustor / Ivanov, V. S., Shamshin, I. O., Frolov, S. M. // Energies. - 2023. - 16. - № 20. - 10.3390/en16207028
dc.identifier.doi10.3390/en16207028
dc.identifier.urihttps://www.doi.org/10.3390/en16207028
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85175347611&origin=resultslist
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/29393
dc.relation.ispartofEnergies
dc.subjectSlit
dc.subjectDeflagration
dc.subjectDilution
dc.subjectDetonation-to-Deflagration Transition
dc.subjectDetonation Propulsion
dc.subjectRotating Detonation Combustors
dc.subjectCombustion Modeling
dc.subjectCombustion Dynamics
dc.titleComputational Study of Deflagration-to-Detonation Transition in a Semi-Confined Slit Combustor
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue20
oaire.citation.volume16
relation.isAuthorOfPublicationf1496521-237e-4526-bfeb-2206034d980e
relation.isAuthorOfPublication.latestForDiscoveryf1496521-237e-4526-bfeb-2206034d980e
relation.isOrgUnitOfPublicationdcdb137c-0528-46a5-841b-780227a67cce
relation.isOrgUnitOfPublication.latestForDiscoverydcdb137c-0528-46a5-841b-780227a67cce
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