首页|加氢站高压低温氢气泄漏扩散数值研究

加氢站高压低温氢气泄漏扩散数值研究

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为了明确加氢站发生高压氢气泄漏后形成可燃区域的分布特性,进行了某加氢站中的35 MPa和70 MPa加氢机发生泄漏事故的数值模拟.研究了泄漏孔径和氢气预冷温度对稳态可燃区域分布形态和体积的影响.计算结果表明,70 MPa加氢机泄漏形成的可燃区域体积约为35 MPa加氢机的两倍.泄漏孔尺寸对可燃区域体积有非常显著的影响.随着预冷温度的降低,射流边界层的气流速度降低,氢气质量分数增大,且后者对稳态可燃区域体积的影响更大,尤其在发生中孔泄漏时,随着氢气预冷温度从300 K降低至240 K,35 MPa加氢机泄漏形成的可燃区域体积从5 590 m3增加到16 835 m3,增长率为201.16％,同时可燃区域的形态从"平面"转换到"羽状".
Numerical study of high-pressure cryogenic hydrogen leakage and diffusion in hydrogen refueling stations
To clarify the distribution characteristics of flammable regions formed after a high-pressure hydrogen leakage in a hydrogen refueling station,numerical simulations of a leakage ac-cident occurring in 35 MPa and 70 MPa hydrogenators are carried out.The effects of leakage hole diameter and hydrogen precooling temperature on the distribution and volume of the steady flam-mable region are investigated.The results show that the volume of the flammable region formed by leakage from a 70 MPa hydrogenator is about twice that of a 35 MPa hydrogenator.The leakage hole diameter has a quite significant effect on the volume of flammable region.As the precooling temperature decreases,the gas velocity in the jet boundary layer decreases while the hydrogen mass fraction increases.The latter has a greater effect on the flammable region volume,especially in the case of medium-hole leakage,with the decrease of the hydrogen precooling temperature from 300 K to 240 K,the volume of the flammable region formed by the leakage of the 35 MPa hydrogenator increases from 5 590 m3 to 16 835 m3,with the growth rate of 201.16％,the mor-phology of the flammable region changed from"flat"to"plume".

hydrogen refueling stationhigh-pressure hydrogenleakage and diffusionflammable regionnumerical simulation

孙若凡、蒲亮、何永琛、严童童、刘运生

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西安交通大学能源与动力工程学院 西安 710049

航天低温推进剂技术国家重点实验室 北京 100028

江西卓超科技有限公司 新余 338000

加氢站 高压氢气 泄漏扩散 可燃区域 数值模拟

国家重点研发计划国家重点研发计划江西省创新高层次人才计划榆林市科技计划咸阳市科技创新专项

2020YFB15062002020YFB1506205jxsq2023101010CXY-2020-050L2022-ZDZX-HBZ-GY-004

2024

低温工程
北京航天试验技术研究所

低温工程

CSTPCD北大核心
影响因子：0.568
ISSN：1000-6516
年,卷(期)：2024.(1)
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