预混氢气对氨气燃烧过程的加速机理研究
Mechanistic Study of Accelerated Characterization of Ammonia Combustion Process by Premixed Hydrogen Gas
肖丽 1邹毅 1雷鸣 1马寅杰2
作者信息
- 1. 国能九江发电有限公司,江西 九江 332001
- 2. 湖南大学 机械与运载工程学院,湖南 长沙 410082
- 折叠
摘要
氨气是一种极具潜力的氢载体,但燃烧速度慢,在动力装置内单独使用存在效率低、稳定性差等问题.掺氢燃烧是加速氨气燃烧过程的有效措施.为了理解掺氢对氨气混合燃料火焰燃烧特性的影响规律,本文基于详细化学动力学计算方法对氨气掺氢的层流火焰传播及反应敏感性分析进行研究.结果表明,提高掺氢比可明显改善氨的燃烧惰性.较高的初始环境温度对燃料的反应起明显的促进作用,而较高的初始环境压力则恰恰相反;层流火焰速度最高的工况均在当量比1.12 左右.
Abstract
Ammonia is a kind of hydrogen carrier with great potential,but the combustion speed is slow,and there are some problems,such as low efficiency and poor stability when used alone in the power plant.Hydrogen-mixed combustion is an effective measure to accelerate the ammonia combustion process.In order to gain a deeper understanding of the impact of hydrogen blending on the flame combus-tion characteristics of ammonia-mixed fuels,this study conducts research based on detailed chemical ki-netic calculations of laminar flame speed and reaction sensitivity to hydrogen blending in ammonia.The results indicate that increasing the hydrogen blending ratio can significantly improve the combustion reac-tivity of ammonia.A higher initial environmental temperature has a noticeable promoting effect on fuel re-actions,while a higher initial environmental pressure has the opposite effect,with the highest laminar flame speed occurring at an equivalence ratio of around 1.12.
关键词
氢氨燃料/燃烧/化学反应动力学/层流火焰速度/敏感性分析Key words
hydrogen-ammonia fuel/combustion/chemical reaction kinetics/laminar flame speed/sensitivity analysis引用本文复制引用
基金项目
湖南省自然科学基金资助项目(2020JJ5071)
出版年
2024
NETL
NSTL
万方数据