The effects of built-in obstacles on methane-air explosion with concentration gradients: An experimental research

Dong, Zhangqiang; Lv, Wei; Huang, Chuyuan; Hao, Jiashun; Chen, Xianfeng; Liu, Lijuan

doi:10.1016/j.jlp.2022.104824

Cited by 4 publications

(1 citation statement)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yang et al (2020) and Liu et al (2020) compared the suppression effect of adding methane-containing oxidizing bacteria and potassium-containing compounds in ultrafine water mist on methane explosion. Inert gases such as nitrogen (Luo et al, 2018), carbon dioxide (Chen et al, 2019), and heptafluoropropane (Dong et al, 2022b) also perform well in suppressing methane explosion pressure, flame propagation rate, and chemical reaction processes. In addition, the application of new modified powder inhibitors, such as modified fly ash (Guo et al, 2022), modified montmorillonite (Yu et al, 2020), and new composite inhibitors (Sun et al, 2019;Wang et al, 2020;Tang et al, 2021;Li et al, 2022), has likewise demonstrated their inhibition effect on the dynamic behavior of methane explosion.…”

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