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首页> 外文期刊>Journal of natural gas science and engineering >Effects of changes in pipe cross-section on the explosion-proof distance and the propagation characteristics of gas explosions
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Effects of changes in pipe cross-section on the explosion-proof distance and the propagation characteristics of gas explosions

机译：管道横截面变化对防爆距离和瓦斯爆炸传播特性的影响

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After establishing a pipe model with a length of 100 m, the propagation characteristics of gas deflagrations were simulated using AutoReaGas software for pipe cross-sectional areas of 0.04 m x 0.04 m, 0.08 m x 0.08 m, 0.12 m x 0.12 m and 0.16 m x 0.16 m. The results showed that the pipe cross-section had a distinct effect on the overpressure, density, temperature, gas velocity and combustion rate of gas explosions. Specifically, as the equivalent pipe diameter increased, the maximum overpressure, density, temperature, gas velocity and combustion rate at each gauge point decreased. As the equivalent pipe diameter increased, the flame arrival time at each gauge point was consequently delayed. In addition, the increase in the equivalent pipe diameter decreased the explosion-proof distance, as well as the dimensionless safety distance. In addition, increasing the equivalent pipe diameter can largely reduce the dimensionless flame-proof distance, thereby making mining workers immune to the threat of gas explosion shockwaves. (C) 2015 Elsevier B.V. All rights reserved.
机译：建立长度为100 m的管道模型后，使用AutoReaGas软件对0.04 m x 0.04 m，0.08 m x 0.08 m，0.12 m x 0.12 m和0.16 m x 0.16 m的管道横截面面积模拟气体爆燃的传播特性。结果表明，管道截面对气体爆炸的超压，密度，温度，气体速度和燃烧速率有明显的影响。具体来说，随着等效管径的增加，每个表压点的最大过压，密度，温度，气体速度和燃烧速率都会降低。随着等效管道直径的增加，火焰到达每个规格点的时间因此而延迟。此外，当量管直径的增加会缩短防爆距离以及无因次安全距离。另外，增加等效管道直径可以大大减小无量纲的隔爆距离，从而使采矿工人不受气体爆炸冲击波的威胁。 （C）2015 Elsevier B.V.保留所有权利。

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