主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (9): 1173-1177.

• •    下一篇

管道内径与壁温对高压氢气自发点火的数值研究

徐婷婷，朱国庆，陈凡宝   

  1. （中国矿业大学安全工程学院，江苏徐州 221116）
  • 出版日期:2022-09-15 发布日期:2022-09-15
  • 作者简介:作者简介：徐婷婷（1997- ），女，中国矿业大学安全工程学院硕士研究生，主要从事消防设备优化、燃烧模拟研究，江苏省徐州市大学路1号，221116。
  • 基金资助:
    国家重点研发计划“高机动多功能应急救援车辆关键技术研究与应用示范”（2016YFC0802900）

Numerical study on spontaneous ignition of high pressure hydrogen gas by tube inner diameter and wall temperature

Xu Tingting, Zhu Guoqing, Chen Fanbao   

  1. (School of Safety Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116, China)
  • Online:2022-09-15 Published:2022-09-15

摘要： 氢气在高压储存中的泄漏容易导致自燃。为探究影响氢气自燃的因素，运用Realizable模型、EDC模型、21步氢/空气化学反应机理对加压氢气在不同管道壁温和管径中突然释放的自燃过程进行了数值模拟。研究结果发现：管道壁温的降低能显著降低氢气自燃的可能性；输送压力小于8 MPa时，管道内径的增加不利于氢气点火自燃，当输送压力过大时（10 MPa），管道内径的增大为氢气射流的膨胀和扩散提供更多空间，利于氢/空气混合物的生成，促进氢气自燃点火。

关键词: 高压氢气泄漏, 管道壁温, 管道直径, 自燃, 数值模拟

Abstract: Hydrogen leakage in high pressure storage is easy to lead to spontaneous combustion. In order to explore the factors affecting the spontaneous combustion of hydrogen, the spontaneous combustion process of pressurized hydrogen in different pipe wall temperature and pipe diameter was simulated by using Realizable model, EDC model and 21-step hydrogen/air chemical reaction mechanism. The results show that the decrease of pipe wall temperature can significantly reduce the possibility of hydrogen spontaneous combustion. When the conveying pressure is less than 8 MPa, the increase of pipe inner diameter is not conducive to hydrogen ignition and spontaneous ignition. When the conveying pressure is too large (10 MPa), the increase of pipe inner diameter provides more space for expansion and diffusion of hydrogen jet, which is conducive to the formation of hydrogen/air mixture and promotes hydrogen spontaneous ignition.

Key words: high-pressure hydrogen leakage, pipe wall temperature, pipe diameter, spontaneous combustion, numerical simulation