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International Letters of Chemistry, Physics and Astronomy
Volume 55

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Evaluation of Natural Ventilation on Temperature and Pressure Distribution in a Road Tunnel Fire with Vertical Shaft

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Abstract:

This paper has analysed the influence of plug-holing on thermal and pressure field evolution in urban road tunnel fires with vertical shaft by Large Eddy Simulation (LES). Results show that the temperature reduction rate is about 70 % at the tunnel half and it increases about 80 % at the ceiling level. The pressure field is characterized by a pseudo-periodic behavior which reaches a maximum reduction rate (78 %) in case of natural ventilation. The numerical tool used is FDS (version 5).

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 55)
Pages:
79-85
Citation:
I. Benabdelaziz et al., "Evaluation of Natural Ventilation on Temperature and Pressure Distribution in a Road Tunnel Fire with Vertical Shaft", International Letters of Chemistry, Physics and Astronomy, Vol. 55, pp. 79-85, 2015
Online since:
July 2015
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References:

[1] L.H. Hu et al (2010), Longitudinal distribution of CO concentration and difference with temperature field in a tunnel fire smoke flow, International Journal of Heat and Mass Transfer, pp.2844-2855.

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2010.02.013

[2] C.G. Fan et al (2013), Expeimental Study of air entrainment mode with natural ventilation using shafts in road tunnel fires, International Journal of Heat and Mass Transfer , pp.750-757.

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.047

[3] W. Zhong et al (2013) , Influence of longitudinal wind on natural ventilation with vertical shaft in a road tunnel fire, , International Journal of Heat and Mass Transfer, p.671, 678.

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2012.10.063

[4] Kalech Brahim, Bouterra Mouad, El Cafsi Afif, Belghith Ali (2011): Study of the temperature Distribution in a Road tunnel under the Effect of two ventilation Systems, Scientific Research, pp.231-242.

DOI: https://doi.org/10.4236/jep.2011.23027

[5] Kevin Mc Grattan, Randall Mc Dermott, Simo Hostikka, Jason Floyd (2010), Fire Dynamics Simulator (version 5) User's Guide, NIST Special Publication 1019-5, June 23, (2010).

DOI: https://doi.org/10.6028/nist.sp.1019-5

[6] Kevin Mc Grattan, Simo Hostikka, Jason Floyd, Howard Baum, Ronald Rehm, William Mell, Randall Mc Dermott (2010).

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