NH_(3)/H_(2)预混合气激光点火特性实验  

Laser Ignition Characteristics of NH_(3)/H_(2)Premixture

作　　者：张俊杰 江鑫 刘昀洋 胡二江[1] 黄佐华[1] Zhang Junjie;Jiang Xin;Liu Yunyang;Hu Erjiang;Huang Zuohua(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《燃烧科学与技术》2024年第1期9-16,共8页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(52176131).

摘　　要：基于定容燃烧弹,在不同初始压力、当量比和掺氢比条件下,对NH_(3)/H_(2)预混合气进行了激光点火实验研究,分析了不同条件下的火焰发展形态及最小点火能量EMI.研究发现,随掺氢比的增加,火焰受浮力的影响减弱,火焰边界逐渐清晰;升高压力能降低混合气的EMI,但不同当量比混合气的EMI受压力改变的影响程度不同;纯氨气的火焰发展极不稳定且EMI极高,掺混H_(2)后能极大降低EMI,可以有效拓宽氨气的可燃使用范围,其中掺氢比为10%时,EMI降低效果最明显.Based on the constant volume combustion chamber,the laser ignition experiments on NH_(3)/H_(2)premixture were carried out under different initial pressure,equivalence ratios and hydrogen mixing ratios.The flame development and minimum ignition energy EMI under different conditions were analyzed.It is found that with the increase of hydrogen mixing ratio,the influence of buoyancy is weakened and the flame boundary becomes clearer.Increasing pressure can lower the EMI of mixture,but the EMI with different equivalence ratio is affected by different pressure.The flame development of pure ammonia is extremely unstable and its EMI is very high.With the mixing of H_(2),the EMI can be greatly lowered,which can effectively broaden the combustible range of ammonia.When the mixing ratio is 10%,the effect of lowering EMI is most obvious.

关 键 词：激光点火 氨气 最小点火能量 点火成功率 定容燃烧弹 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]