Aiming at the problem that common flame arresters can only extinguish deflagration flame, but cannot effectively extinguish detonation flame in large pipelines, this paper proposes a novel structure of detonation arrester based on heat transfer theory to improve the detonation flame extinguishing efficiency. The flame arresting element is composed of a large disk with long triangular slits and is used as the quenching part of detonation arrester in a monolithic structure. Compared with common flame arrester consists of several small fires retarding elements, the proposed monolithic structure is safer due to its integrity. In addition, this paper explores the relationship between flame extinguishing ability, detonation pressure, and temperature change. This investigation determined that the diameter of the quenching part and the parameters(length and height) of the long triangular slits were the key factors affecting the quenching characteristics, and as the diameter and porosity increase, the detonation pressure at the front of the flame arrester will decrease. Finally, the rationality and applicability of the structure are verified by simulation experiments. These preliminary conclusions are helpful to reveal the nature of the proposed structure and solve the technical problem of preventing detonation flame propagation of coal mine gas in large pipelines.

中文翻译：

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一种新型的装有大圆盘，长三角形缝的避雷器：设计和数值模拟

针对普通灭火器在大型管道中只能扑灭爆燃火焰而不能有效扑灭爆燃火焰的问题，提出了一种基于传热理论的新型爆震扑热器结构，以提高其灭火效率。阻火元件由具有长三角形狭缝的大圆盘组成，并用作整体结构中的阻火器的淬火部分。与由几个小的阻燃元件组成的普通阻火器相比，所提出的整体式结构由于其完整性而更加安全。此外，本文还探讨了灭火能力，爆炸压力和温度变化之间的关系。该研究确定了淬火部分的直径和长三角形缝的参数（长度和高度）是影响淬火特性的关键因素，并且随着直径和孔隙率的增加，阻火器前部的起爆压力将减少。最后通过仿真实验验证了该结构的合理性和适用性。这些初步结论有助于揭示所提出结构的性质，并解决防止大型管道中煤矿瓦斯爆炸火焰蔓延的技术问题。仿真实验验证了该结构的合理性和适用性。这些初步结论有助于揭示所提出结构的性质，并解决防止大型管道中煤矿瓦斯爆炸火焰蔓延的技术问题。仿真实验验证了该结构的合理性和适用性。这些初步结论有助于揭示所提出结构的性质，并解决防止大型管道中煤矿瓦斯爆炸火焰蔓延的技术问题。