弱约束条件下氢气含量对甲烷/空气燃爆特性的影响研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (6) : 255-261.

论文

张蓓蓓1，程扬帆1,2，夏煜2，钱家祺2，韦箫2

作者信息 +

Effects of hydrogen content on methane/air deflagration characteristics under a weak constraint condition

ZHANG Beibei1, CHENG Yangfan1，2, XIA Yu2, QIAN Jiaqi2, WEI Xiao2

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文章历史 +

摘要

本研究采用自制的可视化气体爆炸实验设备，以乳胶气球为反应容器模拟弱约束空间，研究不同氢气添加量对甲烷/空气预混气体的爆炸火焰温度场、爆炸压力以及火焰传播速度等特征参数；结合实验测试和Chemkin软件模拟结果，详细分析了氢气浓度对甲烷/空气爆炸特性的影响规律。结果表明：随着氢气含量的增加，混合气体燃爆火焰温度场内部温度变低，火焰边缘温度升高；混合气体的峰值超压和最大压力上升速率均逐渐增大；由于H、O和OH自由基的摩尔分数随着氢气的添加而增加，加速了火焰传播速度。同时，通过对混合气体的敏感性分析发现，甲烷的存在在一定程度上抑制了氢气的燃烧。研究结果可为弱约束空间内氢气/甲烷/空气预混气体的意外爆炸防控提供基础数据，也可为其他可燃气体爆炸特性的研究提供实验方法。

Abstract

In the study, a self-made visual gas explosion experimental equipment was used to simulate the weak constraint space with latex balloon as a reaction vessel. The characteristic parameters of explosion flame temperature field, explosion pressure and flame propagation velocity of methane/air premixed gas with different hydrogen addition were studied. Combined with the experimental test and Chemkin software simulation results, the effects of hydrogen concentration on the explosion characteristics of methane/air were analyzed in detail. The results showed that as the hydrogen content increased, the internal field of the mixed gas combustion flame became lower, and the temperature of flame edge increased. The peak overpressure and the maximum pressure rising rate of the premixed gas increased gradually. Since the mole fractions of H, O and OH radicals increased with hydrogen addition, the flame propagation velocity was accelerated. Meanwhile, through the sensitivity analysis of the mixed-gas, it was found that the combustion of hydrogen would be inhibited by the presence of methane inhibits to a certain extent.

导出引用

张蓓蓓1，程扬帆1,2，夏煜2，钱家祺2，韦箫2. 弱约束条件下氢气含量对甲烷/空气燃爆特性的影响研究[J]. 振动与冲击, 2024, 43(6): 255-261

ZHANG Beibei1, CHENG Yangfan1，2, XIA Yu2, QIAN Jiaqi2, WEI Xiao2. Effects of hydrogen content on methane/air deflagration characteristics under a weak constraint condition[J]. Journal of Vibration and Shock, 2024, 43(6): 255-261

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