Effect of wire mesh on double-suppression of CH4/air mixture explosions in a spherical vessel connected to pipelines

Cui, Yangyang; Wang, Z.R.; Zhou, Kuibin; Ma, Li; Liu, M.H.; Jiang, Juncheng

doi:10.1016/j.jlp.2016.11.017

Cited by 52 publications

(6 citation statements)

References 10 publications

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“…However, it was also found that there is an increased risk of methane combustion reaction after the flame passes through the screen. In addition, Jin et al (2020), Jin et al (2021), Zhang et al (2016), andCui et al (2017) also pointed out that in the explosionproof design of process piping, the combined effect of the number of mesh layers and mesh numbers should be considered simultaneously to determine the explosion suppression structure.…”

Section: Introductionmentioning

confidence: 99%

Suppression characteristics of multi-layer metal wire mesh on premixed methane-air flame propagation

Feng

Zhang²,

Si³

et al. 2023

Front. Mater.

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Metal wire mesh is widely used in the energy industry for its excellent protective properties as a fire stopping and explosion isolating material. In this study, the suppression characteristics of different layers of metal mesh on the dynamic behavior of premixed methane-air flame propagation were studied experimentally. A high-speed photographic schlieren system was used to photograph the explosion process to capture the changes in the microstructure of the flame, and high-frequency pressure sensors and micro-thermocouple measurements were used to capture the flame explosion pressure and temperature. The experimental results show that the suppression effectiveness of wire mesh is a reflection of the coupling of explosive flame propagation behavior and combustion state in the pipe. Increasing the number of mesh layers and mesh density can destroy the microstructure of the premixed methane-air flame front and hinder the progress of flame propagation. Increasing the number of wire mesh layers will delay the peak time of premixed flame propagation speed and reduce the peak speed values of flame propagation. Wire mesh has a pronounced attenuation effect on premixed flame temperature and explosion overpressure. The maximum flame temperature attenuation rate is 34.99%–60.95%, and the maximum explosion overpressure attenuation rate is 33.70%–74.02%. And the suppression effect is greatly enhanced as the increase of mesh layers.

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Section: Introductionmentioning

confidence: 99%

Suppression characteristics of multi-layer metal wire mesh on premixed methane-air flame propagation

Feng

Zhang²,

Si³

et al. 2023

Front. Mater.

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“…The above study was the suppression of gas explosion by water mist. Metal screens are widely used due to their economy and effectiveness, and a number of researchers have conducted numerous studies from theoretical and experimental aspects [24][25][26][27] . In addition, there were more reports on the inhibitory behavior of porous media on gas explosion as well [28][29][30][31] .…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of High Temperature Heat Pipe to Suppress Gas Explosion

Gui

Wang

Zhu

et al. 2023

Preprint

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As a new type of heat transfer element, high temperature heat pipe has high heat transfer efficiency and broad prospects in suppressing gas explosion shock wave and flame. In this paper, the mechanism and effect of gas explosion suppression in high temperature heat pipe were analyzed by theoretical analysis and numerical simulation. ANAYS FLUENT was used to simulate the propagation process of gas explosion, and the simulation results were in good agreement with the experimental results. The influence of high temperature heat pipe on gas explosion propagation characteristics under different working conditions was studied. The results show that the flame propagation speed of gas explosion in the roadway with high temperature heat pipe is reduced, which will have nearly twice the time delay, the peak value of flame temperature is reduced, and the maximum overpressure of gas explosion in the roadway after the high temperature heat pipe is far lower than the maximum overpressure when the high temperature heat pipe is not laid. The layout of high temperature heat pipes in the roadway has different degrees of influence on the explosion suppression effect, and the best explosion suppression effect is achieved when the high temperature heat pipes are placed at 10 m intervals and inclined at 90°. The application of high temperature heat pipe technology to restrain gas explosion has certain feasibility, and the research results are of great significance to the safe and efficient production of coal mines.

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“…Song et al 22 and Yang et al 23 analyzed the gas combustion energy attenuation mechanism of MAAs on thermal dissipation, and examined the relationship between energy attenuation effects and initial parameters. The studies [24][25][26][27] tested the pressure curves on MAAs for suppressing combustible gas explosions in closed experimental pipelines and analyzed maximum pressure rise rates and overpressure to demonstrate the influence of MAAs on gas combustion energy attenuation. Vasil'ev 28 found that FMs could weaken pressure wave intensity.…”

Section: Introductionmentioning

confidence: 99%

Energy attenuation behavior on propane–air premixed combustion on account of nonmetallic spherical spacers in confined space with two perforated plates

Dai,

Yao,

et al. 2023

Energy Science & Engineering

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Energy attenuation behavior on propane premixed combustion on account of nonmetallic spherical spacers (NSSs) was investigated in a constant volume combustion bomb with two accelerative perforated plates. The flame evolution process is captured by a photography device with schlieren. Energy attenuation effects of NSSs were explored on flame propagation, overpressures, and pressure oscillation. Normal combustion accomplished with flame acceleration, jet autoignition, deflagration, and weak detonation is observed, respectively. NSSs show a good energy attenuation effect on propane normal combustion, jet autoignition, and deflagration evolution behavior, however, during the evolution of weak detonation, the attenuation effect is relatively weak. The mean velocities difference, as well as explosion overpressure decay rate caused by NSSs, decreases from (45.70 m/s and 26.48%) to (2.70 m/s and 18.15%) when the initial pressure increases from 0.1 to 0.5 MPa, namely, attenuation effect of NSSs on propane explosion decreases with increasing initial pressure.

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Effect of wire mesh on double-suppression of CH4/air mixture explosions in a spherical vessel connected to pipelines

Cited by 52 publications

References 10 publications

Suppression characteristics of multi-layer metal wire mesh on premixed methane-air flame propagation

Suppression characteristics of multi-layer metal wire mesh on premixed methane-air flame propagation

Numerical Study of High Temperature Heat Pipe to Suppress Gas Explosion

Energy attenuation behavior on propane–air premixed combustion on account of nonmetallic spherical spacers in confined space with two perforated plates

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