Academic Journal
Flame Extensions Under a Curved Ceiling
| Τίτλος: | Flame Extensions Under a Curved Ceiling |
|---|---|
| Συγγραφείς: | Sturdy, Martin, Johansson, Nils |
| Συνεισφορές: | Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Building and Environmental Technology, Division of Fire Safety Engineering, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för bygg- och miljöteknologi, Avdelningen för Brandteknik, Originator |
| Πηγή: | Fire Technology. 61(5):3403-3420 |
| Θεματικοί όροι: | Engineering and Technology, Civil Engineering, Other Civil Engineering, Teknik, Samhällsbyggnadsteknik, Annan samhällsbyggnadsteknik |
| Περιγραφή: | In this paper, the factors affecting flame extension under curved ceilings are presented. An experimental campaign in reduced scale was carried out in Lund University’s Fire Lab using a propane gas burner and heptane pool fire in different positions and heat release rates within a curved ceiling setup. A flame recognition script was developed to identify the flame length in the videos taken for each test. The flame length data was then compared with flame length models found in the literature which have only been developed from buoyancy driven flows. The results show that the curved geometry affects flow, enhancing it and resulting in longer flames. This is particularly clear in the tests with the propane gas burner. When positioned flush against the side wall, the reduced air entrainment and the gas’s momentum cause unburnt fuel to travel further along the ceiling, thereby extending the flame length. In the case of pool fires, proximity to the wall reduces the heat release rate which in turn limits the flameextensions. Consequently, momentum dominated flows such as those produced by the propane burner, result in longer flame extension compared to the buoyancy dominated flows characteristic of pool fires. The greatest difference between the experimental data presented in this study and flame extension models found in the literature is attributed to the omission of the flow’s buoyancy component in these models. Additionally, the type of fire, whether buoyancy or momentum dominated, and its position within the test setup impact the flame extensions. To address these limitations, this work introduces adaptations of previously published models. |
| Σύνδεσμος πρόσβασης: | https://doi.org/10.1007/s10694-025-01735-9 |
| Βάση Δεδομένων: | SwePub |
| FullText | Links: – Type: other Text: Availability: 0 CustomLinks: – Url: https://doi.org/10.1007/s10694-025-01735-9# Name: EDS - SwePub (ns324271) Category: fullText Text: View record in SwePub – Url: https://dx.doi.org/doi:10.1007/s10694-025-01735-9 Name: EDS - Springer Nature Journals (s7799221) Category: fullText Text: View record at Springer |
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| Items | – Name: Title Label: Title Group: Ti Data: Flame Extensions Under a Curved Ceiling – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sturdy%2C+Martin%22">Sturdy, Martin</searchLink><br /><searchLink fieldCode="AR" term="%22Johansson%2C+Nils%22">Johansson, Nils</searchLink> – Name: Author Label: Contributors Group: Au Data: Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Building and Environmental Technology, Division of Fire Safety Engineering, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för bygg- och miljöteknologi, Avdelningen för Brandteknik, Originator – Name: TitleSource Label: Source Group: Src Data: <i>Fire Technology</i>. 61(5):3403-3420 – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Engineering+and+Technology%22">Engineering and Technology</searchLink><br /><searchLink fieldCode="DE" term="%22Civil+Engineering%22">Civil Engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Other+Civil+Engineering%22">Other Civil Engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Teknik%22">Teknik</searchLink><br /><searchLink fieldCode="DE" term="%22Samhällsbyggnadsteknik%22">Samhällsbyggnadsteknik</searchLink><br /><searchLink fieldCode="DE" term="%22Annan+samhällsbyggnadsteknik%22">Annan samhällsbyggnadsteknik</searchLink> – Name: Abstract Label: Description Group: Ab Data: In this paper, the factors affecting flame extension under curved ceilings are presented. An experimental campaign in reduced scale was carried out in Lund University’s Fire Lab using a propane gas burner and heptane pool fire in different positions and heat release rates within a curved ceiling setup. A flame recognition script was developed to identify the flame length in the videos taken for each test. The flame length data was then compared with flame length models found in the literature which have only been developed from buoyancy driven flows. The results show that the curved geometry affects flow, enhancing it and resulting in longer flames. This is particularly clear in the tests with the propane gas burner. When positioned flush against the side wall, the reduced air entrainment and the gas’s momentum cause unburnt fuel to travel further along the ceiling, thereby extending the flame length. In the case of pool fires, proximity to the wall reduces the heat release rate which in turn limits the flameextensions. Consequently, momentum dominated flows such as those produced by the propane burner, result in longer flame extension compared to the buoyancy dominated flows characteristic of pool fires. The greatest difference between the experimental data presented in this study and flame extension models found in the literature is attributed to the omission of the flow’s buoyancy component in these models. Additionally, the type of fire, whether buoyancy or momentum dominated, and its position within the test setup impact the flame extensions. To address these limitations, this work introduces adaptations of previously published models. – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="https://doi.org/10.1007/s10694-025-01735-9" linkWindow="_blank">https://doi.org/10.1007/s10694-025-01735-9</link> |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10694-025-01735-9 Languages: – Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 3403 Subjects: – SubjectFull: Engineering and Technology Type: general – SubjectFull: Civil Engineering Type: general – SubjectFull: Other Civil Engineering Type: general – SubjectFull: Teknik Type: general – SubjectFull: Samhällsbyggnadsteknik Type: general – SubjectFull: Annan samhällsbyggnadsteknik Type: general Titles: – TitleFull: Flame Extensions Under a Curved Ceiling Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sturdy, Martin – PersonEntity: Name: NameFull: Johansson, Nils – PersonEntity: Name: NameFull: Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Building and Environmental Technology, Division of Fire Safety Engineering, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för bygg- och miljöteknologi, Avdelningen för Brandteknik, Originator IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00152684 – Type: issn-print Value: 15728099 – Type: issn-locals Value: SWEPUB_FREE – Type: issn-locals Value: LU_SWEPUB Numbering: – Type: volume Value: 61 – Type: issue Value: 5 Titles: – TitleFull: Fire Technology Type: main |
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