【摘要】 随着氢燃料电池汽车（HFCV）的日益普及，其在室内停车设施中的安全性受到广泛关注，因此评估HFCV在各种停车场景下的氢气泄漏行为非常重要。近年来，属于室内停车场的半封闭式车库由于具有良好的通风条件和占地空间优势，在城市地区的建造越来越普遍，因此也成为氢安全评估的重要场景。本文调查了HFCVs在半封闭停车场景中的氢气安全问题，采用计算流体动力学（CFD）分析了泄漏条件和通风对氢气扩散行为的影响。结果表明，较大的热激活泄压装置（TPRD）孔径会产生较大范围的可燃气体云，但消散也更快；在涉及多辆停放的情况下，氢气会积聚在车辆之间的间隙中，因此增加车辆停放间距可以改善氢气在车辆间的聚集行为；针对自然通风条件，水平风向在降低氢浓度方面比纵向风更有效。研究成果可为氢燃料电池汽车在室内停车环境中特别是在半封闭环境中的安全停放管理提供指导。更多还原

【Abstract】 The increasing adoption of hydrogen fuel cell vehicles(HFCV) has raised significant concerns regarding their safety in indoor parking facilities. Assessment of hydrogen leakage behavior under various parking scenarios is essential for the successful integration of fuel cell vehicles. Semi-enclosed garages, a subset of indoor parking facilities, have become increasingly prevalent in urban areas due to their optimal ventilation characteristics and space utilization, making them critical subjects for safety evaluation. This study examines hydrogen safety considerations for HFCV in semi-enclosed parking environments. CFD simulations were employed to analyze the impact of leakage conditions and ventilation on hydrogen dispersion patterns. Results demonstrate that larger TPRD orifices generate more extensive flammable gas clouds, though these dissipate more quickly. In scenarios with multiple parked vehicles, hydrogen accumulates in intervehicular spaces, and increased vehicle spacing enhances hydrogen dispersion. Moreover, horizontal wind patterns prove more effective than longitudinal wind in reducing hydrogen concentration. These insights provide practical guidance for the safe implementation of hydrogen fuel cell vehicles in indoor parking environments, particularly in semi-enclosed configurations.更多还原