内燃机工程2026，Vol.47Issue(3)：80-85,98,7.DOI:10.13949/j.cnki.nrjgc.2026.03.009
不同温度下氨/空气预混的燃烧特性
Combustion Characteristics of Ammonia/Air Premixtures at Different Temperatures
摘要
Abstract
To further investigate the combustion characteristics and influencing factors of ammonia(NH3),under different temperatures,a constant-volume combustion bomb and a high-speed schlieren imaging system were used to examine the laminar burning velocity and flame instability of NH3 at different initial temperatures and equivalence ratios.Additionally,chemical kinetic studies on ammonia premixed combustion were conducted via CHEMKIN.The results indicate that as the initial temperature increases,the laminar burning velocity increases,and the Markstein length decreases slightly.The sensitivity of the reactions is less affected by temperatures.When the equivalence ratio was 1.1 and the temperature rised from 373 K to 473 K,the laminar burning velocity increased by 68.6％.With the increase of the equivalence ratio,the laminar burning velocity first increased and then decreased,reaching the peak value at the equivalence ratio 1.1.The Markstein length increases with the increasing equivalence ratio.Within the experimental conditions,the flame front exhibits almost no cellular structure.Buoyancy instability follows a trend of"first weakening and then strengthening"with changes in the equivalence ratio,which is exactly opposite to the variation trend of laminar burning velocity.Reaction R39(H+O2⇄O+OH)promotes combustion by regulating O and OH,and its variation trend is consistent with that of the flame velocity.关键词
氨/燃烧/层流火焰速度/浮力不稳定性Key words
ammonia/combustion/laminar burning velocity/buoyancy instability分类
能源科技引用本文复制引用
黎何凌,龚雪,暴秀超,潘锁柱,刘芳世,张智超..不同温度下氨/空气预混的燃烧特性[J].内燃机工程,2026,47(3):80-85,98,7.基金项目
国家自然科学基金青年基金项目(52406155) （52406155）
移动源污染排放控制技术国家工程实验室开放基金资助项目(NELMS2019A16)National Natural Science Foundation of China Youth Fund Project(52406155) （NELMS2019A16）
Open Fund Project of the National Engineering Laboratory for Mobile Source Pollution Emission Control Technology(NELMS2019A16) （NELMS2019A16）
