密闭空间内10%氢气浓度的氢气-空气混合气体燃爆的仿真和实验研究
摘要：摘要当今世界各国正积极开发新能源以实现碳中和的目标,氢能是新能源中备受关注的一种能源形式。氢安全是氢能利用领域中被重点关注的问题之一,但氢气的燃烧和爆炸研究实验具有一定危险性。与实验相比,计算仿真是一种低成本且更安全的方法。针对10%氢气浓度的氢气-空气混合气体在密闭空间的燃爆现象,进行了4个工况的实验,并依托FLACS程序开展计算仿真,将实验结果与仿真结果进行对比分析。结果显示,FLACS计算压强的平均误差为15.3%,温度的平均误差为10.4%。FLACS压强峰值的高估比例为1.073,温度峰值高估比例则为1.272。误差的部分原因是FLACS无法模拟部分实验现象,例如部分火焰熄灭,导致仿真峰值数据高于实验数据。仿真结果中,压强和温度数据相比于实验数据有提早上升的趋势,这与许多文献的结论一致。该现象发生的原因在于FLACS模拟中燃烧是点火零时刻发生,而实验中燃烧在燃料被实际点燃时发生,该时刻与点火器启动时刻有短暂时间间隔。对比层流火焰燃烧速度,FLACS仿真的误差为13%。对比温度场发展趋势图,仿真与实验结果都显示火焰往罐体上部传播速度最快,在实验中火焰前锋停止于罐体两侧而仿真结果的火焰前锋则停止于罐体上部。
Abstract:：Nowadays, new energies are being developed rapidly to achieve the goal of carbon neutrality at a sooner date. Hydrogen energy is one of the new energies that has received much attention. Hydrogen safety is one of the key concerns in the application of hydrogen energy. Hydrogen combustion and detonation experiments have certain dangers, while simulation is a cost-saving and more secure method compared to experiments. In this paper, four experiment tests were conducted and compared with simulation results by using FLACS under a hydrogen concentration of 10%. Results showed that the mean error for the pressure profile was 15.3% and 10.4% for the temperature profile. The overpredict ratio (maximum value) for the pressure profile was 1.073 while 1.272 for the temperature profile. Some experimentally observed phenomena, such as partial flame extinction, were not simulated in FLACS tool, resulting in higher simulated maximum data than experimental data. Simulation pressure and temperature data rose earlier than the experimental data were observed, which was consistent with the conclusions of many papers. The reason for this phenomenon was that in the FLACS simulation, the combustion occurred after the ignition time was reached, while the combustion only took place when the fuel reached the flammable limit in the experiment. Comparing the laminar flame velocity, the error ratio between the experiment and simulation was at least 13%. Inhere, the experimental and simulated temperature field development trends were also compared. Both simulation and experimental results showed that the flame propagated the fastest to the upper part of the tank. The flame eventually ended on both sides of the tank in the experiment, while the simulation results showed that the flame eventually ended on the upper part of the tank.
中文标题：密闭空间内10%氢气浓度的氢气-空气混合气体燃爆的仿真和实验研究
英文标题：Simulation and Experimental Comparison of Hydrogen Confined Space Explosion with 10% Hydrogen Concentration
发表时间：2022-08-18
作者：
PUA Cheng-lin, 胡珀, 翟书伟
作者简介：
PUA Cheng-lin（1999-）,男,硕士研究生,主要从事氢气安全技术研究。胡 珀（1978-）,男,博士,讲师,主要从事氢气安全技术、核反应堆安全技术研究。
关键词：氢安全,FLACS,仿真计算,
Key words：hydrogen safety,FLACS,simulation,
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