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Theoretical and Experimental Study of Critical Velocity for Smoke Control in a Tunnel Cross-Passage
School of Mechanical Engineering, Southwest Jiaotong University, China.
School of Mechanical Engineering, Southwest Jiaotong University, China.
Fire Technology, SP Technical Research Institute of Sweden. (MERO Mälardalen Safety Science Lab)
2013 (English)In: Fire technology, ISSN 0015-2684, E-ISSN 1572-8099, Vol. 49, no 2, p. 435-449Article in journal (Refereed) Published
Abstract [en]

Theoretical analyses and model-scale experiments have been conducted to investigate the critical velocity in a tunnel cross-passage which is defined as the minimum ventilation velocity through the fireproof door to prevent smoke from flowing into a cross-passage. The effect of the fireproof door geometry, heat release rate, ventilation velocity and fire source location were taken into account. The critical velocity in a tunnel cross-passage varies approximately as three-second power of the fireproof door height, as one-third power of the heat release rate and as exponential law of the ventilation velocity, almost independent of the fireproof door width. The critical Froude Number range varies mainly between 5 to 10 and consequently as it is not a constant value it is not very suitable to predict the critical velocity in a tunnel cross-passage. A dimensionless correlation that can correlate well with the experimental data was proposed

Place, publisher, year, edition, pages
2013. Vol. 49, no 2, p. 435-449
Keywords [en]
tunnel fire; cross-passage; smoke control; critical velocity
National Category
Engineering and Technology
Research subject
Energy- and Environmental Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-11365DOI: 10.1007/s10694-010-0170-0ISI: 000313645600012Scopus ID: 2-s2.0-84872603301OAI: oai:DiVA.org:mdh-11365DiVA, id: diva2:385295
Available from: 2011-01-11 Created: 2011-01-11 Last updated: 2017-12-11Bibliographically approved

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