Large eddy simulation and experimental study of the effect of wire mesh on flame behaviours of methane/air explosions in a semi-confined pipe

Cheng, Fangming; Chang, Zhuchuan; Luo, Zhenmin; Liu, Changchun; Wang, Tao; He, Chunxu

doi:10.1016/j.jlp.2020.104258

Cited by 22 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results also revealed that the primary function of explosion suppressants was determined by the nature of the combustible gas rather than the shape of the explosion suppressor material. Through experimental and computer simulations, Cheng et al’s [ 16 ] study of the inhibitory impact of metal wire mesh on gas explosions revealed that metal wire mesh may efficiently reduce the flame’s temperature when premixed flames spread via a pipeline. The attenuation rate increased to 79% with the addition of three layers of 60 mesh metal wire mesh.…”

Section: Introductionmentioning

confidence: 99%

Research on the Rule of Explosion Shock Wave Propagation in Multi-Stage Cavity Energy-Absorbing Structures

Chen¹,

Liu

2023

Materials

View full text Add to dashboard Cite

The propagation laws of explosion shock waves and flames in various chambers were explored through a self-built large-scale gas explosion experimental system. The propagation process of shock waves inside the cavity was explored through numerical simulation using Ansys Fluent, and an extended study was conducted on the wave attenuation effect of multiple cavities connected in a series. The findings show that the cavity’s length and diameter influenced the weakening impact of shock waves and explosive flames. By creating a reverse shock wave through complicated superposition, the cavity’s shock wave weakening mechanism worked. By suppressing detonation creation inside the cavity, the explosive flame was weakened by the cavity’s design. The multi-stage cavity exhibited sound-weakening effects on both shock waves and explosive flames, and an expression was established for the relationship between the suppression rate of shock force and the number of cavities. Diffusion cavities 35, 55, 58, and 85 successfully suppressed explosive flames. The multi-stage cavity efficiently reduced the explosion shock wave. The flame suppression rate of the 58-35 diffusion cavity explosion was 93.38%, whereas it was 97.31% for the 58-35-55 cavity explosion. In engineering practice, employing the 58-58 cavity is advised due to the construction area, construction cost, and wave attenuation impact.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on the Rule of Explosion Shock Wave Propagation in Multi-Stage Cavity Energy-Absorbing Structures

Chen¹,

Liu

2023

Materials

View full text Add to dashboard Cite

show abstract

“…It was also pointed out that the initial methane concentration, initial pressure, ignition energy, and vent location were essential factors affecting the suppression effect of wire mesh. Cheng et al (2020), Cheng et al (2022) analyzed the quenching process of explosion flame through wire mesh by combining largeeddy simulations with experiments. They emphasized that a screen structure in the process piping is effective in preventing the propagation of explosion flame and reducing accidental losses.…”

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.

View full text Add to dashboard Cite

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.

show abstract

“…Applying the averaging approach to such studies would reduce the quality of numerical results. Several studies have used LES to provide predictions of explosions in various applications (Cheng et al, 2020;Cocks et al, 2015;Di Sarli et al, 2009;Ghani et al, 2015;Ibrahim et al, 2009;Jaravel et al, 2017;Li et al, 2016;Molkov et al, 2006;Puggelli et al, 2021;Rochette et al, 2018;Schmitt et al, 2015;Veynante and Moureau, 2015;Volpiani et al, 2017;Wen et al, 2012). Examples of this is consist of investigating vented explosions, including hydrogen, in a laboratory scale combustion chamber (Abdel-Raheem et al, 2015;Di Sarli et al, 2009;S.…”

Section: Introductionmentioning

confidence: 99%

LES – DFSD modelling of vented hydrogen explosions in a small-scale combustion chamber

EL-Shimy

Ibrahim

Malalasekera

2021

Journal of Loss Prevention in the Process Industries

View full text Add to dashboard Cite

Large eddy simulation and experimental study of the effect of wire mesh on flame behaviours of methane/air explosions in a semi-confined pipe

Cited by 22 publications

References 30 publications

Research on the Rule of Explosion Shock Wave Propagation in Multi-Stage Cavity Energy-Absorbing Structures

Research on the Rule of Explosion Shock Wave Propagation in Multi-Stage Cavity Energy-Absorbing Structures

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

LES – DFSD modelling of vented hydrogen explosions in a small-scale combustion chamber

Contact Info

Product

Resources

About