基于虚点源理论的掺氢天然气非预混射流火焰轴线温度试验研究  

Experimental study on flame axits temperature of unpremixed jet of hydrogen-doped natural gas based on virtual point source theory

作　　者：蒋宏业[1] 李平[1] 罗京 路昊 Jiang Hongye;Li Ping;Luo Jing;Lu Hao(College of Petroleum and Gas Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China;China Petroleum Group Logging Co.,Ltd.,Chongqing 400021,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]中国石油集团测井有限公司,重庆400021

出　　处：《消防科学与技术》2025年第4期457-464,共8页Fire Science and Technology

摘　　要：掺氢天然气现已在工业和民用领域得到应用,将体积分数较低的氢气掺入天然气管网的氢能输运策略是可行的。但由于氢气性质的活跃性,混合氢气到天然气管道中可能会增加管道发生射流火灾的概率,其中温度特性是导致火灾事故的关键因素。文章通过设定不同掺氢比、流量和泄漏孔径,对天然气非预混射流火焰轴线温度进行试验研究。结果表明:轴线温度整体随着高度呈先上升后下降的变化趋势。随着流量增大,火焰温度增加,且向火焰上方进行延伸。随着掺氢比增大,火焰整体温度增加。基于虚点源模型对火焰高度进行修正,得到基于虚点源理论的无量纲掺氢天然气轴线温度拟合关系,为掺氢天然气发生射流燃烧火灾风险评估提供依据。Hydrogen-blended natural gas has already been implemented in industrial and residential sectors,and the strategy of transporting hydrogen by integrating it at low volume fractions into natural gas pipelines is feasible.However,due to the reactive properties of hydrogen,introducing hydrogen into natural gas pipelines may increase the likelihood of jet fire incidents,with temperature being a key factor in these accidents.Therefore,an experimental study was conducted on the axial temperature of non-premixed jet flames of natural gas at various hydrogen blending ratios,flow rates,and leak sizes.The experimental results indicate that the axial temperature generally exhibits an upward trend followed by a decrease with increasing height.As the flow rate increases,the range of flame temperatures also expands.Additionally,as the hydrogen blending ratio increases,the peak temperature of the flame rises.The flame height was adjusted using a virtual origin model,and a dimensionless relationship for the axial temperature of hydrogen-blended natural gas based on this model was derived,providing a basis for assessing the risk of jet combustion fires of hydrogen-blended natural gas.

关 键 词：掺氢天然气 非预混燃烧火焰 掺氢比 温度分布 虚点源 

分 类 号：X932[环境科学与工程—安全科学] TK16[动力工程及工程热物理—热能工程]