Spectrally resolved calculation of thermal radiation penetration into liquid n-heptane in pool fires

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Isojärvi, Teemu
dc.contributor.author Bordbar, Hadi
dc.contributor.author Hostikka, Simo
dc.date.accessioned 2018-09-21T09:49:04Z
dc.date.available 2018-09-21T09:49:04Z
dc.date.issued 2018-12-01
dc.identifier.citation Isojärvi , T , Bordbar , H & Hostikka , S 2018 , ' Spectrally resolved calculation of thermal radiation penetration into liquid n-heptane in pool fires ' INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , vol 127 , pp. 1101-1109 . DOI: 10.1016/j.ijheatmasstransfer.2018.08.108 en
dc.identifier.issn 0017-9310
dc.identifier.other PURE UUID: 31c8e971-ad05-4728-8f9d-70217be9e12a
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/spectrally-resolved-calculation-of-thermal-radiation-penetration-into-liquid-nheptane-in-pool-fires(31c8e971-ad05-4728-8f9d-70217be9e12a).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85052503783&partnerID=8YFLogxK
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/34046
dc.description.abstract The radiative heat transfer in a volatile hydrocarbon pool fire was investigated by obtaining the transmittance of infrared radiation through fuel (n-heptane) layers of different depths. The incident radiation spectrum was assumed to be either the same as a spectrum obtained experimentally for a 2 me ter pool fire, or to be a Planck distribution corresponding to the approximate flame temperature. The transmittances were calculated by integrating either the single-ray Lambert-Beer formula, the two-flux method or the analytical plane-parallel monochromatic/gray solution of the radiative transfer equation over wavelength, using the liquid spectral absorption coefficients found in literature. The obtained results are validated against earlier measurements, and the possibility of calculating them with significantly less computation time by using a k-distribution method was investigated. The results managed to replicate the measured heat flux values in the liquid with a fractional error of only about 5% being attainable even with a 3-point quadrature method. The use of the k-distribution, more known and used in gas phase thermal radiation calculations, significantly speeds up the calculations. It was found out that in the calculation of total transmitted fractions of radiation, the flame spectrum can be approximated with a Planck distribution of an appropriate temperature. en
dc.format.extent 9
dc.format.extent 1101-1109
dc.language.iso en en
dc.relation.ispartofseries Volume 127 en
dc.rights embargoedAccess en
dc.subject.other Condensed Matter Physics en
dc.subject.other Mechanical Engineering en
dc.subject.other Fluid Flow and Transfer Processes en
dc.subject.other 216 Materials engineering en
dc.title Spectrally resolved calculation of thermal radiation penetration into liquid n-heptane in pool fires en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Civil Engineering
dc.subject.keyword spectral radiation
dc.subject.keyword k-distribution
dc.subject.keyword liquid n-heptane
dc.subject.keyword pool fire
dc.subject.keyword numerical modeling
dc.subject.keyword Condensed Matter Physics
dc.subject.keyword Mechanical Engineering
dc.subject.keyword Fluid Flow and Transfer Processes
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201809215141
dc.identifier.doi 10.1016/j.ijheatmasstransfer.2018.08.108
dc.date.embargo info:eu-repo/date/embargoEnd/2020-08-30

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