Explosion suppression by a cloud of particles: Numerical analysis of the initial processes

Kosinski, Pawel

doi:10.1016/j.amc.2010.07.074

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…The effective gas explosion suppressants currently known include inert gas, , water mist, , chemical dry powder, rock dust, porous material, , and aerosol . Moreover, a large number of studies show that the type, particle size, spray mode, and mass concentration of the explosion suppression medium can affect the suppression effect to a certain extent. ,− In order to further enhance the explosion suppression effect of the medium, Pei et al studied the synergistic inhibition effect of CO 2 and ultrafine water mist on methane explosion. The experimental results showed that the inhibiting effect on flame propagation speed and overpressure of the combined use was greater than that of either individual suppressant, and Wang et al also pointed out that the gas–solid two-phase synergistic suppression of gas explosion is better than a single explosion suppression method.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion

Zhou

2021

ACS Omega

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Passive explosion suppression remains an indispensable auxiliary method for gas explosion suppression due to its low cost. To explore a new type of explosion passive suppression technology, three rectangular cavities with different width–diameter ratios were designed and laid in a large-scale methane/air explosion experiment system, and its explosion suppression performance was evaluated by measuring the changes in the explosion flame and shock wave before and after passing through the cavity. The results show that the suppression effect of the cavity is affected by its width. The larger the width–diameter ratio, the faster the attenuation of the flame and shock wave. The cavity-combined aluminum hydroxide powder effectively improves the suppression effect. When the filling amount of the powder is 140 g, the flame is quenched. However, there is an optimal powder filling degree for the suppression of the shock wave in the limited space of the cavity. In the test range, the maximum decay rate of the overpressure and impulse are 49.4 and 39.4%, respectively. This study can provide theoretical guidelines for the suppression of gas explosion.

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Section: Introductionmentioning

confidence: 99%

Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion

Zhou

2021

ACS Omega

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“…e development of explosion and flame suppression technology is important for the prevention and control of gas explosion accidents in mining tunnels and underground urban pipeline systems. To this end, much theoretical research and experimental investigations have been conducted in this field both at home and abroad; for example, omas, Pawel Kosinski, Mikhail Krasnyansky, Hermanns, Lu Shouxiang, Bi Mingshu, Yu Minggao, Xu Hongli, Wang Xishi, Wen Hu, Luo Zhenmin et al [2][3][4][5][6][7][8][9][10][11][12] have conducted successful studies on gas explosion suppression using water mist, powder inhibitors, and inert gas technology. Shao Jiwei et al [13] demonstrated experimentally that porous materials have an obvious explosion suppression effect.…”

Section: Introductionmentioning

confidence: 99%

Influence of Chamber Geometrical Parameters on Suppressing Explosion Propagation

Zhuo

Guo

Yuan

et al. 2021

Shock and Vibration

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In this article, the effect of a chamber’s geometrical parameters on suppressing gas explosion propagation was studied. Three rectangular chambers were used in the study, with a constant length of 0.5 m, a constant height of 0.2 m, and a variable width of 0.3 m, 0.5 m, and 0.8 m; each chamber was installed in a pipeline system for experimental research. The experimental results showed that when the chamber length and height were fixed at 0.5 m and 0.2 m, respectively, the suppression effect of the chamber on the explosion shockwave improves with the increase in the chamber width; when the chamber width increases to 0.8 m, the chamber has suppressive effect on explosion shockwave propagation. It was also found that the suppression effect of the chambers on the explosion flame improves with the increase in the chamber width; when the width of the chamber is 0.5 m, the chamber effectively suppresses explosion flames. Based on the experimental results, a numerical model was established to simulate the suppression effect of five types of chambers with a length, width, and height of 0.5 m × 0.3 m × 0.2 m, 0.3 m × 0.5 m × 0.2 m, 0.5 m × 0.5 m × 0.2 m, 0.5 m × 0.8 m × 0.2 m, and 0.8 m × 0.5 m × 0.2 m, respectively. The numerical simulation results indicated that when the chamber length and height are constant at 0.5 m and 0.2 m, respectively, the suppressive effect of the chamber on the shockwave improves as the chamber width increases; when the chamber width increases to 0.8 m, the shockwave overpressure at the chamber outlet is attenuated by 10.61%, indicating that the chamber suppresses the propagation of explosion shockwave, which is consistent with the experimental results obtained in the study. It was also found that when the chamber width and height were constant at 0.5 m and 0.2 m, respectively, as the chamber length increases, the overpressure increases first and then weakens. When the chamber length increases to 0.8 m, the overpressure at the chamber outlet is attenuated by −14.16%, indicating that the chamber is not able to suppress the propagation of explosion shockwave. Finally, a numerical simulation of the propagation process of a methane-air mixture and explosion flames in different chambers was performed to analyse the effect of chamber geometrical parameters on explosion suppression effect.

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Dust explosions: CFD modeling as a tool to characterize the relevant parameters of the dust dispersion

Murillo

Dufaud

Bardin‐Monnier

et al. 2013

Chemical Engineering Science

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Explosion suppression by a cloud of particles: Numerical analysis of the initial processes

Cited by 6 publications

References 3 publications

Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion

Influence of Cavity Width and Powder Filling in a Cavity on Overpressure Evolution Laws and Flame Propagation Characteristics of Methane/Air Explosion

Influence of Chamber Geometrical Parameters on Suppressing Explosion Propagation

Dust explosions: CFD modeling as a tool to characterize the relevant parameters of the dust dispersion

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