安全、健康和环境2025，Vol.25Issue(5)：10-16,7.DOI:10.3969/j.issn.1672-7932.2025.05.002
140K低温高压氢气射流火焰特性研究
Study on Flame Characteristics of 140 K Low Temperature High Pressure Hydrogen Jet
摘要
Abstract
Efficient storage of hydrogen is the key to the whole life cycle development of hydrogen energy industry.Due to the high density properties of liquid hydrogen,hydrogen refueling stations with cryogenic liquid hydrogen storage technology have proven to be critical infrastructure in the future hydrogen economy.In the process of low-temperature hydrogen leakage,due to insufficient diffusion of hydrogen,it is easy to form a jet flame,which seriously threatens the safety of personnel and property.However,the current research on the flame characteristics of low-temperature hydrogen jet is insufficient,and its combustion mechanism still needs to be further explored.Based on this,the characteristics of hydrogen ejection flame were analyzed by experiments under 5 different pressure conditions at low temperature of 140 K.The results showed that the flame length was affected by both temperature and mass flow rate.The increase of gas density and specific heat capacity at low temperature will slow down the flame propagation speed,while the high kinetic energy flow will promote the lon-gitudinal extension of the flame,and the dominant effect of temperature on the flame length was weakened.The flame temperature distribution was strongly correlated with the pressure.Under high pressure conditions,the near-field temperature of the nozzle can reach 1 600 K,and the high temperature region decayed slowly along the jet direction.The radiant heat flux characteristics showed that the peak flame radiation intensity of high-pressure jet appeared at about 1 m away from the nozzle,which was attributed to the larger combustion zone formed by high-pressure jet and the turbulent mixing strengthening effect.However,the radiant energy de-creased exponentially with distance,indicating that the combustion reaction was concentrated in the area near the nozzle.The sound pressure level generated by the hydrogen jet flame in this experiment was not enough to cause permanent damage to personnel in an unconstrained space,and the optimization of flame stability and safety should be focused on the large-scale application of hydrogen energy.关键词
射流火焰/高压氢气/低温氢/温度场/火焰长度/火焰热通量Key words
jet flame/high-pressure hydrogen/low temperature hydrogen/temperature field/flame length/flame heat flux分类
能源与动力引用本文复制引用
赵隆池,聂世帅,蔡鹏,于安峰,沈晓波..140K低温高压氢气射流火焰特性研究[J].安全、健康和环境,2025,25(5):10-16,7.基金项目
国家重点研发计划项目(2023YFC3008805),典型危化品泄漏快速安全处置多级组合装备研发及系统集成. （2023YFC3008805）
