Investigation on temperature distribution under the coupling action of transverse position and fire sealing of linear fire in tunnel

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorXu, Gangen_US
dc.contributor.authorZhu, Guoqingen_US
dc.contributor.authorPan, Rongliangen_US
dc.contributor.authorLiu, Xinen_US
dc.contributor.departmentDepartment of Civil Engineeringen
dc.contributor.groupauthorStructures – Structural Engineering, Mechanics and Computationen
dc.contributor.organizationChina University of Mining and Technologyen_US
dc.date.accessioned2021-05-26T07:04:58Z
dc.date.available2021-05-26T07:04:58Z
dc.date.issued2021-08en_US
dc.descriptionFunding Information: The work was supported by the National Key Research and Development Program of China (No. 2016YFC0802900 ). Publisher Copyright: © 2021 The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
dc.description.abstractBy sealing the portal at one end of tunnel and changing the transverse location of linear fire source in tunnel, the hot smoke layer, longitudinal temperature distribution and maximum temperature of linear fire source were investigated. It is found that the flame will bend under the influence of curved ceiling and hot smoke layer will be thicker when the linear fire source approaches to the side wall. The variation law of heat release rate is analyzed by considering the limiting effect of side wall and thermal feedback. By modifying the previous formula of effective ceiling height, an empirical formula for predicting longitudinal temperature distribution of linear fire sources with different aspect ratios is proposed, and the ventilation coefficient is obtained to characterized the temperature under sealing and without sealing. Moreover, the accuracy of predicted temperature under sealing is verified by using the ventilation coefficient. Based on dimensional analysis, it's concluded that the maximum temperature mainly depends on the heat release rate, and an empirical formula is proposed to predict the maximum temperature rise of linear fire sources with different aspect ratios in several transverse positions. The error of predicted values and actual values is within 13%.en
dc.description.versionPeer revieweden
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationXu, G, Zhu, G, Pan, R & Liu, X 2021, ' Investigation on temperature distribution under the coupling action of transverse position and fire sealing of linear fire in tunnel ', Case Studies in Thermal Engineering, vol. 26, 101032 . https://doi.org/10.1016/j.csite.2021.101032en
dc.identifier.doi10.1016/j.csite.2021.101032en_US
dc.identifier.issn2214-157X
dc.identifier.otherPURE UUID: 52288f87-7d30-427a-8de9-f08387f9f84fen_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/52288f87-7d30-427a-8de9-f08387f9f84fen_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85105751041&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/63053331/1_s2.0_S2214157X21001957_main.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/107746
dc.identifier.urnURN:NBN:fi:aalto-202105267005
dc.language.isoenen
dc.publisherElsevier BV
dc.relation.ispartofseriesCase Studies in Thermal Engineeringen
dc.relation.ispartofseriesVolume 26en
dc.rightsopenAccessen
dc.subject.keywordFire characteristicsen_US
dc.subject.keywordFireproof sealingen_US
dc.subject.keywordLinear fire sourceen_US
dc.subject.keywordLongitudinal temperature distributionen_US
dc.subject.keywordMaximum ceiling temperature riseen_US
dc.titleInvestigation on temperature distribution under the coupling action of transverse position and fire sealing of linear fire in tunnelen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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