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Experimental study of sidewall effect on flame characteristics of heptane pool fires with different aspect ratios and orientations in a channel
University of Science and Technology of China, China ; School of Transportation Engineering, Hefei University of Technology, China.
University of Science and Technology of China, China.
RISE - Research Institutes of Sweden, Safety and Transport, Safety.
RISE - Research Institutes of Sweden, Safety and Transport, Safety.
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2017 (English)In: Proceedings of the Combustion Institute, ISSN 1540-7489, E-ISSN 1873-2704, Vol. 36, no 2, 3121-3129 p.Article in journal (Refereed) Published
Abstract [en]

A series of small scale tests was conducted to investigate the influence of sidewall on flame characteristics of heptane pool fires in a channel, considering pool shape (aspect ratio: 1, 2, 4 and 8) and pool orientation relative to sidewall. Distance between fire and sidewall was changed systematically. Both transverse flame development (along the direction of channel width) and longitudinal flame development (along the direction of channel length) were recorded by digital video. Results show that for a fixed fire location, the heat release rate increases with the increasing pool aspect ratio (namely a larger pool perimeter), which indicates more air entrainment and more intense combustion. In wall fire cases, when the long pool rim is perpendicular with channel sidewall, the flame can obtain more air entrainment with a weaker boundary restriction from the sidewall, compared to the case with the long pool rim being parallel with sidewall. Comparison of some previously established correlations based on various experimental conditions with our test results is made. Due to the fact without considering sidewall effect and fuel shape on the air entrainment of fire plume, the classic correlations need to be further improved. Therefore, an integral flame length model considering both sidewall effect and fuel shape is developed, which correlates well with all the data from cases with various pool positions, orientations and aspect ratios. © 2016 The Combustion Institute. Published by Elsevier Inc.

Place, publisher, year, edition, pages
2017. Vol. 36, no 2, 3121-3129 p.
Keyword [en]
Air entrainment, Flame length, Fuel shape, Pool fire, Sidewall effect, Aspect ratio, Combustion, Computer graphics, Fire protection, Fires, Fuels, Heptane, Lakes, Multimedia systems, Supersonic aerodynamics, Experimental conditions, Flame characteristics, Heat Release Rate (HRR), Heptane pool fires, Pool fires, Sidewall effects, Small-scale tests
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-31128DOI: 10.1016/j.proci.2016.06.196Scopus ID: 2-s2.0-84978870580OAI: oai:DiVA.org:ri-31128DiVA: diva2:1136482
Note

Funding details: 51376173, NSFC, National Natural Science Foundation of China; Funding text: This work was supported by National Natural Science Foundation of China (NSFC) under Grant no. 51376173, National Key Research and Development Plan under Grant no. 2016YFC0800100 and National Top-Notch Young Talents Program. Chuan Gang Fan was also financially supported by the Opening Fund of the State Key Laboratory of Fire Science under Grant no. HZ2016-KF03.

Available from: 2017-08-28 Created: 2017-08-28 Last updated: 2017-08-29Bibliographically approved

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