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Theoretical and Exp...
Theoretical and Experimental Study of Critical Velocity for Smoke Control in a Tunnel Cross-Passage
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- Li, Ying Zhen (author)
- School of Mechanical Engineering, Southwest Jiaotong University, China
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- Lei, Bo (author)
- School of Mechanical Engineering, Southwest Jiaotong University, China
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- Ingason, Haukur (author)
- RISE,SP – Sveriges Tekniska Forskningsinstitut / Brandteknik, skydd (BRs )
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(creator_code:org_t)
- 2010-08-24
- 2013
- English.
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In: Fire technology. - : Springer Science and Business Media LLC. - 0015-2684 .- 1572-8099. ; 49:2, s. 435-449
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- 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
Keyword
- tunnel fire; cross-passage; smoke control; critical velocity
- TECHNOLOGY
- TEKNIKVETENSKAP
- Energy- and Environmental Engineering
- energi- och miljöteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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