通过数值模拟研究了不同障碍物排列方式对非均匀氢-空气混合物爆炸火焰动力学的影响，模拟预测的爆炸特性参数均与实验结果吻合良好。模拟结果表明，预混火焰在管内经历了球形火焰、指形火焰、锥形火焰和絮状火焰4个阶段的演化过程。火焰经过障碍物时流场严重不稳定，导致火焰发生严重畸变。当障碍物两侧布置时，火焰最先到达管道出口，压力最快达到峰值。管道顶部障碍物能显著提高爆炸压力，与底部布置相比，障碍物在管道两侧布置和顶部布置时爆炸峰值压力分别增加了23%和74%。该研究可为氢安全规划和防爆提供理论指导。
The effect of different obstacle arrangements on the explosion flame dynamics of inhomogeneous hydrogen-air mixture is investigated by numerical simulation, and the explosion characteristic parameters predicted by the simulation are all in good agreement with the experimental results. The simulation results show that the premixed flame undergoes four stages of evolution in the tube: spherical flame, finger flame, conical flame, and flocculent flame. When the flame passes through the obstacle, the flow field is seriously unstable, resulting in serious distortion of the flame. When the obstacle is arranged on both sides, the flame reaches the pipe outlet first, and the pressure reaches the peak the fastest. The obstacle at the tube top can significantly increase the explosion pressure, and compared with the bottom arrangement, the explosion peak overpressure increases by 23% and 74% when the obstacle is arranged on both sides and at the top of the tube, respectively. This study can provide theoretical guidance for hydrogen safety planning and explosion protection.
2024,46(11): 17-22 收稿日期：2023-07-24
DOI：10.3404/j.issn.1672-7649.2024.11.004
分类号：U677.6
基金项目：大连市科技创新基金资助项目（2021JJ11CG004）
作者简介：齐柏毅(1999-),男,硕士研究生,研究方向为氢能船舶安全
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