A study of hydrogen leak and explosion in different regions of a hydrogen refueling station

超压 点火系统 环境科学 风速 泄漏 爆燃 前线(军事) 最小点火能量 机械 核工程 气象学 化学 航空航天工程 物理 热力学 工程类 环境工程 爆炸物 有机化学 起爆
作者
Kun Liu,Canxing He,Yongzhe Yu,Chaoya Guo,Si‐Min Lin,Jieyu Jiang
出处
期刊:International Journal of Hydrogen Energy [Elsevier BV]
卷期号:48 (37): 14112-14126 被引量:39
标识
DOI:10.1016/j.ijhydene.2022.12.267
摘要

The consequences of hydrogen leaks and explosions are predicted for the sake of the safety in hydrogen refueling stations. In this paper, the effect of wind speed on hydrogen leak and diffusion is analyzed in different regions of a hydrogen refueling station, and the influence of delayed ignition time on hydrogen explosion after an accidental hydrogen leak is further studied by numerical simulation. Results show that the effect of wind speed on the probability of hydrogen fires is distinctive in different regions of hydrogen refueling station. The size of combustible clouds in the trailer front region and the outer region increases in the low wind speed case, and the front of combustible clouds is formed in a spherical shape in the outer region, which can greatly increase the probability of hydrogen explosion. However, the high wind speed may cause an increase of the risk of accidents in the near ground region. Moreover, a non-linear correlation is shown between the rate of combustible cloud dissipation and wind speed after the hydrogen stops leaking. In addition, it is found that an increase in delayed ignition time may lead to an increase in explosion intensity, which is related with the larger high temperature area and stronger explosion overpressure. Two flame fronts and the reverse propagation of the explosion overpressure can be observed, when the delayed ignition time is larger.
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