A new correlation for gas temperature inside a burning enclosure

Delichatsios, Michael; Lee, Yee-Ping; Tofiło, Piotr

doi:10.1016/j.firesaf.2009.06.009

Cited by 65 publications

(44 citation statements)

References 5 publications

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“…The U.S. Nuclear Regulatory Commission (NRC) and National Institute of Standards and Technology (NIST) have also evaluated several hand-calculations methods [3,12], and it was found that MQH correlation captured the appropriate physics but in general over-predicted the HGL temperature with 17% compared to the experimental data. Efforts were made during the 1980s to derive analytical models for predicting different fire conditions, but there are also examples of work conducted lately [13,14]. Nevertheless, most of the work has been done on single room compartments, and few have studied the conditions outside the room of fire origin.…”

Section: δ =̇( )mentioning

confidence: 99%

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An evaluation of two methods to predict temperatures in multi-room compartment fires

Johansson

Svensson

Hees

2015

Fire Safety Journal

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Section: δ =̇( )mentioning

confidence: 99%

“…The combined experimental standard uncertainty, U c , for a case that consists of n different components can be calculated with Eq. (14).…”

Section: Experimental Uncertaintiesmentioning

confidence: 99%

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An evaluation of two methods to predict temperatures in multi-room compartment fires

Johansson

Svensson

Hees

2015

Fire Safety Journal

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“…For a fully development under-ventilated compartment fire, the flames can be observed to eject from the opening of the compartment with hot gases and smokes, then spread to upper floors and ignite superstructure or burnable wall. Extensive investigations have been addressed on such flame ejecting behavior, on which the characteristic parameters and regulations are focused, including temperature profile [1][2][3], heat radiation intensity [4][5], heat flux profile [6][7] as well as flame shape and dimensions [6][7][8][9]. However, former investigation paid little attention to how to inhibit fire spreading speed and reduce the danger of outflow hot gases by using external conditions.…”

Section: Introductionmentioning

confidence: 99%

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Fu¹,

Li²,

Zhang³

2015

Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015

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Abstract. To obtain knowledge to prevent upward fire spread caused by ejected hot gas, a numerical modeling and theoretical analysis have been done by FDS software. It is believed that the horizontal projection play an important role of inhibiting vertical flame spread, however, effect of the positon of the horizontal projection on the façade temperature distribution couldn't been concerned in previous research. Changing the length of and the position of the horizontal projection, the hot gas temperature and velocity outside of the fire room were measured and analyzed. The location of horizontal projection closer the top of fire room and the horizontal projection length larger, the effect of inhibiting the vertical spread is more obvious.

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“…Recently, a model of facade flame heights has been brought up by Delichatsios et al [12][13][14][15][16][17]. The flames on the facade eject from the compartment opening when the heat release rate in the compartment is higher than the critical value (1500A √ H kW) with the mean facade flame height determined by the excess fuel burning outside the opening as well as by the opening geometry of the compartment.…”

Section: Introductionmentioning

confidence: 99%

Effects of side walls on facade flame entrainment and flame height from opening in compartment fires

Tang

et al. 2013

MATEC Web of Conferences

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Abstract. This paper presents an investigation of the side wall effects on facade flames ejected from the opening (such as a window) of an under-ventilated room fire. Experiments are carried out in a reduced-scale experimental setup, consisting of a cubic fire compartment having an opening with a vertical facade wall and two side walls normal to the façade wall. By changing the distance of the two side walls, the facade flame heights for different opening conditions (width, height) are recorded by a CCD camera. It is found that as the distance of the two side walls decreases the behavior the flame height can be distinguished into two regimes characterized by the dimensionless excess heat release rate,Q * ex , outside the opening: (a) for the "wall fire" (Q * ex ≤ 1.3), the flame height is shown to change little with decrease of side wall distance as the dominant entrainment is from the front direction (normal to the facade wall) independent of the side wall distances; (b) for the "axis-symmetrical fire" (Q * ex > 1.3), the flame height increases significantly with a decrease in side wall distance as both the entrainment from the two side directions (parallel to the facade wall) and that from the front direction (normal to the facade wall) together apply. A global physically based non-dimensional factor K is then brought forward based on the side wall constraint effect on the facade flame entrainment to characterize the side wall effect on the flame height, by accounting for the dimensionless excess heat release rate, the characteristic length scales of the opening as well as the side wall separation distance. The experimental data for different opening dimensions and side wall distances collapse by using this global non-dimensional factor.

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A new correlation for gas temperature inside a burning enclosure

Cited by 65 publications

References 5 publications

An evaluation of two methods to predict temperatures in multi-room compartment fires

An evaluation of two methods to predict temperatures in multi-room compartment fires

Untitled

Effects of side walls on facade flame entrainment and flame height from opening in compartment fires

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