NH_(3)/H_(2)流动状态下的激光点火及燃烧特性研究  

Laser Ignition and Combustion Characterization Under Ammonia/Hydrogen Flow Condition

作　　者：张俊杰 陈子豪 矫健 胡二江[1] 黄佐华[1] ZHANG Junjie;CHEN Zihao;JIAO Jian;HU Erjiang;HUANG Zuohua(State Key Laboratory of Multiphase Flow for 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：《工程热物理学报》2025年第3期988-995,共8页Journal of Engineering Thermophysics

基　　金：两机专项(No.J2019-Ⅲ-0004-0047);国家自然科学基金(No.52176131)。

摘　　要：本文基于流动点火平台,在不同掺氢比和当量比条件下,对NH_(3)/H_(2)混合气进行了激光点火实验研究,分析了不同条件下的点火成功率、最小点火能量(MIE)及火焰发展情况。研究发现,掺混H(2)后能有效降低混合气的MIE,其中掺混比为10%时效果最明显,但改变掺氢比对火焰后续发展影响不明显;提高当量比会使MIE先下降再上升,当量比为0.8时,混合气MIE最低,改变当量比对火焰面积,火焰发光强度和火焰质心有明显影响,提高当量比能有效改善氨气火焰的燃烧性能。In this paper,based on the flow ignition platform,laser ignition experiments were carried out on NH_(3)/H_(2) mixtures under different hydrogen doping ratios and equivalent ratios,and the probability of ignition,minimum ignition energy(MIE),and flame development were analyzed under different conditions.It was found that H_(2) doping can effectively reduce the MIE of the mixture,of which the effect is most obvious when the doping ratio is 10%.But the effect of changing the hydrogen doping ratio on the subsequent development of the flame is not obvious.Increasing the equivalent ratio will make the MIE first decline and then rise.With the equivalent ratio of 0.8,the mixture of the MIE is the lowest.The change of the equivalent ratio has a significant effect on the flame area,the intensity of the flame luminescence and the flame center of gravity.The increase of the equivalent ratio can effectively improve the combustion performance of ammonia flame.

关 键 词：激光点火 氨气 最小点火能量 火焰发展 流动点火 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]