Experimental Study Of Burning Rate Behaviour In Confined And Ventilated Fire Compartments

Prétrel, Hugues; Querre, P.; Forestier, M. Y.

doi:10.3801/iafss.fss.8-1217

Cited by 52 publications

(62 citation statements)

References 3 publications

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“…Previous studies shows that the fire behavior in confined compartment is extremely complicated, and the results obtained under different circumstance even seems contradictory. The results from Hugues et al [8] shows the burning rate in confined compartment excesses the burning rate in open space. However, Sugawa et al [9] got a contradictory conclusion from their studies which exhibited the burning rate in confined space is much less than open space.…”

Section: Introductionmentioning

confidence: 99%

Studies on fire behavior in a confined compartment based on reduced-scale experiment

Zhou¹,

Mao²,

Huang³

et al. 2015

Proceedings of the 2015 International Forum on Energy, Environment Science and Materials

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Abstract.A reduced-scale compartment model was built to investigate the fire behavior in a confined compartment. Three different sizes of pool fire were involved in this study. And the fire behaviors in open space were also studied to compare with which in the confined compartment. The results shows the fire in confined space associated with larger pool exhibits a sharper growth and decrease in mass burning rate(MBR); meanwhile, a larger pool led to higher top MBR. When compare the fires in confined space with open space, the fires in open space got their top burning rate earlier, and they exhibited stronger and more frequent fluctuation. The influence brought by confined compartment on the fire was more pronounced in smaller pool fire. The processes of heat release rate (HRR) in confined compartment was also obtained.

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Section: Introductionmentioning

confidence: 99%

Studies on fire behavior in a confined compartment based on reduced-scale experiment

Zhou¹,

Mao²,

Huang³

et al. 2015

Proceedings of the 2015 International Forum on Energy, Environment Science and Materials

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8][9][10][11]), whereas fewer studies have focused on mechanically-ventilated room fires (e.g. [12][13][14][15][16][17]). The latter configuration is particularly relevant for the nuclear industry where compartments are generally sealed from one another and connected through a ventilation network.…”

Section: Introductionmentioning

confidence: 99%

“…In [13], the burning rate in mechanically-ventilated fires has been investigated in a similar way to natural ventilation conditions by controlling the mechanical ventilation flow rates (which is analogous to the ventilation factor in natural ventilation cases). Table 1 is rather an average MLR (Mass Loss Rate) during the burning period.…”

Section: Introductionmentioning

confidence: 99%

“…An analysis of the experimental data provided in [13] has been performed in [14] by applying the well-stirred reactor approach developed in [7] in quasi-steady state conditions. The analysis relied on the assumption that "the room temperatures do not cause significant additional heat flux to the fuel surface and therefore additional pyrolysis".…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Burning Rate of Liquid Fuels in Confined and Mechanically-Ventilated Compartments using a Well-Stirred Reactor Approach

Beji

Merci

2014

Fire Technol

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The objective of this work is to provide a 'support tool' to assess the burning rate of a pool fire in a well-confined and mechanically-ventilated room using a single-zone model based on conservation equations for mass, energy and oxygen concentration. Such configurations are particularly relevant for nuclear facilities where compartments are generally sealed from one another and connected through a ventilation network. The burning rates are substantially affected by the dynamic interaction between the fuel mass loss rate and the rate of air supplied by mechanical ventilation. The fuel mass loss rate is controlled by (i) the amount of oxygen available in the room (i.e. vitiation oxygen effect) and (ii) the thermal enhancement via radiative feedback from the hot gas to the fuel surface. The steady-state burning rate is determined by the 'interplay' and balance between the limiting effect of oxygen vitiation and the enhancing effect of radiative feedback. An extensive sensitivity study over a wide range of fuel areas and mechanical ventilation rates shows that a maximum burning rate may be obtained.

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“…Several aspects of the fire dynamics (e.g., mechanisms inducing pressure peaks at ignition and extinction) for different scenarios of interest have been extensively studied both experimentally and numerically (e.g., (Prétrel et al, 2005), , (Prétrel et al, 2012), (Lapuerta et al, 2012), (Bonte et al, 2013), (Wahlqvist and van Hees, 2013), (Pelzer and Klein-Hessling, 2013)). However, pressure and burning rate instabilities have been only experimentally reported and analysed.…”

Section: Introductionmentioning

confidence: 99%

Blind Simulation of Periodic Pressure and Burning Rate Instabilities in the Event of a Pool Fire in a Confined and Mechanically Ventilated Compartment

Beji

Merci

2016

Combustion Science and Technology

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Fire dynamics in a well-confined and mechanically ventilated enclosure (a configuration of interest to the nuclear industry) strongly depends on the interaction between the fuel burning rates and the intake and exhaust volume flow rates (delivered by the fans). Several experiments show that, in the under-ventilated regime, an oscillatory behaviour may be established with frequencies in the order of few mHz. This paper reports one of the first comprehensive numerical analyses performed in order to study periodic pressure and burning 1 rate instabilities for the case of a full-scale heptane pool fire, for which experimental data has not been published yet. In the numerical analysis, carried out with the Fire Dynamics Simulator (FDS), periodic pressure and burning rate instabilities were predicted with a frequency of approximately 10 mHz. The analysis shows evidence of the correlation between the variation of ventilation flow rates (due to pressure instabilities) and the burning rate oscillations. The latter oscillations are directly linked to oscillations in the fuel burning area attributed to the ventilation-controlled conditions.

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Experimental Study Of Burning Rate Behaviour In Confined And Ventilated Fire Compartments

Cited by 52 publications

References 3 publications

Studies on fire behavior in a confined compartment based on reduced-scale experiment

Studies on fire behavior in a confined compartment based on reduced-scale experiment

Assessment of the Burning Rate of Liquid Fuels in Confined and Mechanically-Ventilated Compartments using a Well-Stirred Reactor Approach

Blind Simulation of Periodic Pressure and Burning Rate Instabilities in the Event of a Pool Fire in a Confined and Mechanically Ventilated Compartment

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