scholarly journals Detailed modeling of a small-scale turbulent pool fire

2020 ◽  
Vol 214 ◽  
pp. 224-237 ◽  
Author(s):  
Bifen Wu ◽  
Somesh P. Roy ◽  
Xinyu Zhao
Keyword(s):  
Pool Fire ◽  
Small Scale

scholarly journals Prediction of a Small-Scale Pool Fire with FireFoam

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Camilo Andrés Sedano ◽  
Omar Darío López ◽  
Alexander Ladino ◽  
Felipe Muñoz
Keyword(s):  
Numerical Results ◽  
Pool Fire ◽  
Flame Height ◽  
Combustion Model ◽  
Small Scale ◽  
Average Temperature ◽  
Eddy Simulation ◽  
Fire Experiment ◽  
Large Eddy ◽  
Good Agreement

A computational model using Large Eddy Simulation (LES) for turbulence modelling was implemented, by means of the Eddy Dissipation Concept (EDC) combustion model using the fireFoam solver. A small methanol pool fire experiment was simulated in order to validate and compare the numerical results, hence trying to validate the effectiveness of the solver. A detailed convergence analysis is performed showing that a mesh of approximately two million elements is sufficient to achieve satisfactory numerical results (including chemical kinetics). A good agreement was achieved with some of the experimental and previous computational results, especially in the prediction of the flame height and the average temperature contours.

Addition of a water mist on a small-scale liquid pool fire: Effect on radiant heat transfer at the surface

2002 ◽  
Vol 29 (1) ◽  
pp. 377-384 ◽  
Author(s):  
J. Richard ◽  
J.P. Garo ◽  
J.M. Souil ◽  
J.P. Vantelon ◽  
D. Lemonnier
Keyword(s):  
Heat Transfer ◽  
Radiant Heat ◽  
Water Mist ◽  
Liquid Pool ◽  
Pool Fire ◽  
Small Scale ◽  
Radiant Heat Transfer ◽  
Fire Effect

Study on Burning Characteristics of Small-Scale Ethanol Pool Fire in Closed and Open Space Under Low Air Pressure

2011 ◽  
Author(s):  
Yi Zeng ◽  
Jun Fang ◽  
Ran Tu ◽  
Jinjun Wang ◽  
Yongming Zhang
Keyword(s):  
Burning Rate ◽  
Open Space ◽  
Flame Temperature ◽  
Pool Fire ◽  
Air Pressure ◽  
Small Scale ◽  
Pulsation Frequency ◽  
Pool Fires ◽  
Closed Space ◽  
Ambient Conditions

This paper presents results of different burning rates of small-scale ethanol pool fires at pressures of 0.6∼1.0 atm in closed and open space. Experiments were performed using a square burner of side length of 4 cm under two different conditions: one was taken in a closed low air pressure cabin (0.5 m3, the interior pressure ranges from 0.6–1.0 atm); another was taken in open space respectively in Hefei (air pressure: 1.0 atm) and Lhasa (air pressure: 0.66 atm). The pool fire characteristics including the burning rate, the axial temperature and pulsation frequency of flame were measured. In closed space, the burning rate, flame temperature, and pulsation frequency of small-scale ethanol pool fires decreased with the decreasing pressure, while in open space they increased when the air pressure reduced. As a result of different ambient conditions and oxygen depletion, the burning rate, flame temperature and pulsation frequency were lower at lower air pressure in closed space but were higher at higher air pressure in open space.

Thermal radiation from a small-scale pool fire: Influence of externally applied radiation

1993 ◽  
Vol 92 (1-2) ◽  
pp. 71-84 ◽  
Author(s):  
X.L. Zhang ◽  
J.P. vantelon ◽  
P. Joulain
Keyword(s):  
Thermal Radiation ◽  
Pool Fire ◽  
Small Scale

scholarly journals Carbon Particulate in Small Pool Fire Flames

1981 ◽  
Vol 103 (2) ◽  
pp. 357-362 ◽  
Author(s):  
S. Bard ◽  
P. J. Pagni
Keyword(s):  
Light Transmission ◽  
Diffusion Flames ◽  
Pool Fire ◽  
Small Scale ◽  
Flame Radiation ◽  
Volume Fractions ◽  
Distribution Form ◽  
Multi Wavelength ◽  
Two Parameters ◽  
Carbon Particulate

Flame radiation, the dominant heat transfer mechanism in many combustion and fire safety related problems, is primarily controlled by the fraction of flame volume occupied by solid carbon particulate. A multi-wavelength laser transmission technique is used here to measure carbon particulate volume fractions and approximate particle size distributions in ten common solid, cellular and liquid fueled small scale, 0 (10 cm dia), pool fire diffusion flames. The most probable particle radius, rmax, and concentration, N0, are two parameters in the assumed gamma function size distribution form which are determined for each fuel by simultaneously measuring light transmission of two superimposed laser wavelengths. The resulting soot volume fractions range from fv ∼ 4 × 10−6 for cellular polystyrene to fv ∼ 7 × 10−8 for alcohol. Cellular polystyrene has the largest particles, rmax ∼ 60 nm while wood has the smallest, rmax ∼ 20 nm. The carbon particulate optical properties used in the analysis are shown to be representative of actual flame soot and are more accurate than the soot refractive index usually assumed in the literature. Finally, mean particle sizes obtained for all fuels indicate that the small particle absorption limit assumption is a reasonable approximation for infrared flame radiation calculations.

Experimental study of small scale n-heptane pool fire with water bath in an altitude chamber

2015 ◽  
Vol 90 ◽  
pp. 1153-1159 ◽  
Author(s):  
Jiajie Yao ◽  
Jiahao Liu ◽  
Xiao Chen ◽  
Haihang Li ◽  
Yi Niu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pool Fire ◽  
Water Bath ◽  
Small Scale

Numerical Simulation and Research of Pool Fire Suppressed by Water Mist in the Engineroom of a Ship

2010 ◽  
Vol 29-32 ◽  
pp. 651-657 ◽  
Author(s):  
Jian He Zhao ◽  
Ye Gao ◽  
Hong Mei Wu
Keyword(s):  
Numerical Simulation ◽  
Oxygen Content ◽  
Large Scale ◽  
Cone Angle ◽  
Water Mist ◽  
Fire Fighting ◽  
Pool Fire ◽  
Cooling Effect ◽  
Small Scale ◽  
Spray Cone

Ship engineroom fire is one of the most common and serious disasters in shipwrecks. It has become a hotspot of research to use water mist system to extinguish engineroom fire efficiently in the ship fire fighting field. In this paper, using Fluent to simulate water mist suppressing engineroom fire on the conditions of different fire scales, droplet diameters, spray cone angles and spray pressures. Research indicates that: large scale fires are more easily suppressed than small scale fires by water mist in the enclosure engineroom; the droplets of water mist should be neither too big nor too small, or else it would go against fire fighting. It is pointed out that the droplets should be in the range of 200 μm to 400 μm; the smaller cone angle nozzle can guarantee a high flame cooling effect; the increase of spray pressure can enhance the flame cooling effect, but probably of only marginal help in reducing the oxygen content.

Effect on Radiant Heat Transfer at the Surface of a Pool Fire Interacting With a Water Mist

2009 ◽  
Vol 132 (2) ◽  
Author(s):  
J. P. Garo ◽  
J. P. Vantelon ◽  
D. Lemonnier
Keyword(s):  
Magnitude Estimate ◽  
Radiant Heat ◽  
Water Mist ◽  
Flame Stabilization ◽  
Pool Fire ◽  
Heat Extraction ◽  
Small Scale ◽  
Attractive Alternative ◽  
Radiant Heat Transfer ◽  
Order Of Magnitude

It is well established that the use of water mist can be an attractive alternative to gaseous suppression agents to extinguish fires for specific scenarios. Among the main mechanisms, which act together to extinguish fires when using a water mist: heat extraction, oxygen displacement, and radiant heat attenuation, the last one has received the less attention, especially regarding the energy balance at the fuel surface and, therefore, the rate of generation of flammable vapors. The objective of this work is to analyze, on the one hand, the perturbing influence of a mist addition as an opposed flow to a small-scale liquid (heptane) pool fire structure, especially at its base, the more interesting zone regarding the mechanisms of flame stabilization and extinction and, on the other hand, the effect on the surface radiant heat feedback. Experiments conducted give an order of magnitude estimate in essential agreement with a radiation computation, based on the mappings, previously obtained, of the two major parameters: temperature and extinction coefficient, that determine the thermal radiation of the flame. The important information is the confirmation that radiation attenuation cannot be identified as a predominant mechanism of extinguishment.

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