阻火器孔径比对汽油蒸气-空气预混火焰传播特性的影响研究

doi:10.16265/j.cnki.issn1003-3033.2026.09.0257

摘要/Abstract

摘要：

为探究阻火器孔径比对汽油蒸气-空气预混火焰淬熄特性的影响,开展可视化汽油蒸气-空气预混气体阻火试验,利用高速相机和数据采集器记录火焰传播过程及参数变化,研究蜂窝状阻火器孔径比α(0~0.060)对火焰传播形态、火焰传播速度、超压及温度变化特性的影响。结果表明:孔径比对爆炸超压与温度分布具有显著影响;α ≤ 0.027时,阻火器能完全抑制火焰传播,但诱发长持时反向振荡火焰脉动,反向火焰振幅随孔径比增大而减小;α ≥ 0.033时,阻火器增强湍流,火焰传播加速,管道下游速度峰值随孔径比增大而增大;阻火成功时仅出现单一超压峰值(较无阻火器管道降低约78%),下游温度始终低于50.00 ℃;阻火失败呈3阶段压力特征,最大超压峰值和下游温度峰值的到达时间分别缩短约45%和48.57%。

关键词: 阻火器, 孔径比, 汽油蒸气-空气, 预混火焰, 火焰传播形态, 火焰传播速度

Abstract:

To investigate the effects of flame arrester aperture ratio on the propagation characteristics of premixed gasoline vapor-air flames, visualization experiments on flame arresting were conducted. A high-speed camera and data recorders were employed to capture the flame propagation process and variations in parameters. The effects of the aperture ratio α (0~0.060) of flame arresters on flame morphology, flame propagation speed, overpressure, and temperature were subsequently analyzed. The results indicate that the aperture ratio significantly affects the explosion overpressure and temperature distribution. When α ≤ 0.027, the flame arrester completely suppresses flame propagation. However, a long-duration reverse oscillating flame pulsation is induced. The reverse flame amplitude decreases with increasing aperture ratio. When α ≥ 0.033, the flame arrester enhances turbulence and accelerates flame propagation. The downstream velocity peak increases with increasing aperture ratio. Under successful flame arrest, only a single overpressure peak appears, which is reduced by approximately 78% compared to that in the pipeline without an arrester. The downstream temperature remains below 50.00 ℃. Under failed flame arrest, the overpressure evolution exhibits three distinct stages. The arrival times of the maximum overpressure peak and the downstream temperature peak are shortened by approximately 45% and 48.57% compared with the no-arrester condition, respectively.

Key words: flame arrester, aperture ratio, gasoline vapor-air, premixed flame, flame propagation morphology, flame propagation speed

中图分类号:

X937

毛相铮, 徐观淦, 宋鹏, 胡玉凤, 邢化岛, 解立峰. 阻火器孔径比对汽油蒸气-空气预混火焰传播特性的影响研究[J]. 中国安全科学学报, 2026, 36(9): 217-224.

Mao Xiangzheng, Xu Guan'gan, Song Peng, Hu Yufeng, Xing Huadao, Xie Lifeng. Effects of flame arrester aperture ratio on propagation characteristics of premixed gasoline vapor-air flames[J]. China Safety Science Journal, 2026, 36(9): 217-224.

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α	阻火结果	最大爆炸超压/kPa
α	阻火结果	上游	下游
0	—	392.61	391.26
0.008	成功	85.30	85.59
0.015	成功	86.42	87.72
0.027	成功	88.43	88.67
0.033	失败	368.55	365.76
0.053	失败	383.84	381.79
0.060	失败	388.79	386.59

α	温度峰值/℃		最大升温速率/(℃/ms)
α	上游	下游	上游	下游
0	1 284.98	1 448.67	21.42	23.06
0.008	835.55	41.58	14.76	1.35
0.015	938.52	45.07	12.81	1.88
0.027	625.14	49.27	11.98	2.49
0.033	788.73	1 556.17	17.02	30.84
0.053	960.03	1 530.49	21.05	44.31
0.060	1 177.50	1 468.75	27.55	28.83