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A novel detonation arrester containing a large disk with long triangular slits: Design and numerical simulation

机译：一种新的爆炸避雷器，包含长三角形狭缝的大圆盘：设计和数值模拟

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摘要

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.
机译：针对普通火焰避雷器只能熄灭脱液火焰的问题，但不能有效地灭火在大型管道中的爆炸火焰，提出了一种基于传热理论的爆炸避雷器的新结构，以提高爆轰火焰灭火效率。阻燃元件由具有长三角形狭缝的大盘组成，用作整体结构中的爆震避雷器的淬火部分。与普通火焰避雷器相比，由于其完整性，所提出的单片结构是更安全的。此外，本文探讨了火焰灭火能力，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狭缝的参数（长度和高度）是影响淬火特性的关键因素，随着直径和孔隙率的增加，火焰避雷器前面的爆炸压力将减少。最后，通过模拟实验验证了结构的合理性和适用性。这些初步结论有助于揭示所提出的结构的性质，解决了在大型管道中防止煤矿气体爆炸火焰繁殖的技术问题。

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