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Volume 34 Issue 5
Sep 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(5): 055201.
SUN Weikang, CHEN Xianfeng, FENG Mengmeng, HUANG Chuyuan, LIU Jing, ZHAO Qi, ZHI Xueke. Effect of the Wire Mesh Structure on the Flame Characteristics of Methane/Air Deflagration[J]. Chinese Journal of High Pressure Physics, 2020, 34(5): 055201. doi: 10.11858/gywlxb.20200536
Citation: SUN Weikang, CHEN Xianfeng, FENG Mengmeng, HUANG Chuyuan, LIU Jing, ZHAO Qi, ZHI Xueke. Effect of the Wire Mesh Structure on the Flame Characteristics of Methane/Air Deflagration[J]. Chinese Journal of High Pressure Physics, 2020, 34(5): 055201. doi: 10.11858/gywlxb.20200536
shu

Effect of the Wire Mesh Structure on the Flame Characteristics of Methane/Air Deflagration

doi: 10.11858/gywlxb.20200536

  • School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan 430070, Hubei, China

  • Received Date: 03 Apr 2020
  • Rev Recd Date: 07 May 2020
    Abstract
  • A deflagration experiment of methane/air premixed gas with or without wire mesh was carried out in the self-design square pipe. The effects of the mesh number and layer number of the wire mesh on the deflagration overpressure and temperature were discussed. The results show that the wire mesh can effectively suppress the temperature and overpressure of the deflagration flame. After the wire mesh is installed, the temperature peak and the overpressure peak measured in the pipeline are reduced compared to the case without wire mesh, and the temperature peak attenuation rate reaches 52.37%, the peak attenuation rate of overpressure reaches 66.84%; the mesh number and layer number of the wire mesh are important factors that affect the suppression effect of the wire mesh on overpressure. When the number of layers and meshes are small, the time to reach the peak of the overpressure is earlier than the condition with no wire mesh; when the number of layers and meshes are moderate, the secondary peak appears in the overpressure curve; when the number of layers and meshes are large, the overpressure is effectively suppressed. With the increase of the number of meshes and layers, the flame heat diffusion rate forward becomes slower, and the start time of the temperature curve is delayed compared to the time delay without the wire mesh.

     

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