Experimental observation of ethanol–air premixed flames propagating inside a closed tube with high aspect ratio

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorNational Space Research Institute (INPE)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorFederal University of Rio Grande do Sul (UFRGS)-
Autor(es): dc.contributorInternational Research Group for Energy Sustainability (IRGES)-
Autor(es): dc.creatorSerra, Aguinaldo M.-
Autor(es): dc.creatorAndrade, José C.-
Autor(es): dc.creatorSilva, Lucas M.-
Autor(es): dc.creatorSantos, José C.-
Autor(es): dc.creatorSilveira, Julia C.-
Autor(es): dc.creatorde Carvalho, João A.-
Autor(es): dc.creatorMendiburu, Andrés Z.-
Data de aceite: dc.date.accessioned2025-08-21T15:55:38Z-
Data de disponibilização: dc.date.available2025-08-21T15:55:38Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s40430-022-04006-8-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/248254-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/248254-
Descrição: dc.descriptionThe present article aims to experimentally observe the flame propagation of ethanol–air mixtures in a tube closed at both ends with an aspect ratio of 27.68. The mixtures were prepared with equivalence ratios ranging from 0.8 to 1.1. The tests were performed for initial pressures of 20, 40, and 60 kPa. The phenomenon of flame front inversion was observed in all experiments. This phenomenon is also known as tulip flame. It was also observed that the flame front inverted several times at the equivalence ratios of 1.0 and 1.1. After the initial deceleration, the velocity oscillated with a high amplitude at these equivalence ratios. An analysis of the available experimental data was performed to better understand the conditions that allow the flame velocity oscillations to occur. It was found that these oscillations manifest when the following conditions are met: (a) closed channels, (b) sufficiently high laminar flame velocity and (c) sufficiently high aspect ratio. Moreover, this phenomenon is coupled with pressure waves that develop inside the duct. The relationship between the distance for the formation of the flattened flame front and the laminar flame velocity was used to define a characteristic time that correlates with the available experimental data.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado do Rio Grande do Sul-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCombustion and Propulsion Laboratory National Space Research Institute (INPE), Rod. Pres. Dutra, km 39, SP-
Descrição: dc.descriptionDepartment of Chemistry and Energy School of Engineering São Paulo University (UNESP), Guaratinguetá, Av. Ariberto P. da Cunha, 333, SP-
Descrição: dc.descriptionDepartment of Mechanical Engineering Federal University of Rio Grande do Sul (UFRGS), R. Sarmento Leite 425, RS-
Descrição: dc.descriptionInternational Research Group for Energy Sustainability (IRGES), R. Sarmento Leite 425, RS-
Descrição: dc.descriptionDepartment of Chemistry and Energy School of Engineering São Paulo University (UNESP), Guaratinguetá, Av. Ariberto P. da Cunha, 333, SP-
Descrição: dc.descriptionFAPESP: 2015/23351-9-
Descrição: dc.descriptionFAPESP: 2015/25435-5-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado do Rio Grande do Sul: 21/2551-0000677-3-
Descrição: dc.descriptionCNPq: 423369/2018-0-
Idioma: dc.languageen-
Relação: dc.relationJournal of the Brazilian Society of Mechanical Sciences and Engineering-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectClosed tubes-
Palavras-chave: dc.subjectDeflagrations-
Palavras-chave: dc.subjectEthanol-
Palavras-chave: dc.subjectFlame front inversion-
Título: dc.titleExperimental observation of ethanol–air premixed flames propagating inside a closed tube with high aspect ratio-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.