贫预混燃烧室氨氢燃烧数值模拟研究
Numerical Simulation of Ammonia Hydrogen Combustion in Lean Premixed Combustor
宋权斌 1常薛峰 1肖和波 1罗玺 1李雅琴 1李新卓1
作者信息
- 1. 长沙理工大学 能源与动力工程学院,长沙 410114
- 折叠
摘要
氨气因燃烧时无碳排放越来越受到人们的关注,通过数值模拟对纯氨以及氨氢混合燃料在贫预混燃烧室中的燃烧特性以及污染物排放进行了研究.结果表明:纯氨以及掺氢比为 10%～50%的氨氢混合燃料均可在本文所采用的燃烧室中稳定燃烧;随着掺氢比的增大,主燃区温度越来越高,火焰形状越来越宽,在掺氢比达到61%时发生回火;随着掺氢比的增大,主燃区内产生的NO浓度单调递增;在火焰筒出口处由于从掺混孔以及冷却孔射入大量空气,掺氢比由0 增加到30%时NO摩尔分数单调增加到2.13×10-4,当掺氢比继续增大时NO浓度呈下降趋势.
Abstract
Ammonia has attracted more and more attention because it has no carbon emission when it is burned.The combustion characteristics and pollutant emission of pure ammonia and ammonia-hydrogen hybrid fuel with equivalent calorific value in lean combustion premixed combustion chamber were studied by numerical simulation.The results show that the pure ammonia and the ammonia-hydrogen mixed fuel with the ratio of 10%-50%can be stably burned in the combustion chamber designed in this paper,and the parameters of combustion efficiency and outlet temperature distribution coefficient meet the requirements.With the increase of hydrogen-doped ratio,the temperature of the main combustion zone becomes higher and higher,and the flame shape becomes wider and wider.When the hydrogen-doped ratio reaches 61%,tempering occurs.With the increase of hydrogen-doped ratio,the concentration of NO produced in the main combustion zone increases monotonically.At the outlet of the flame tube,due to the injection of a large amount of air into the mixing and cooling holes,when the hydrogen-doped ratio increases from 0 to 30%,the NO mole fraction monotonically increases to 2.13×10-4,and the concentration of NO decreases when the hydrogen-doped ratio continues to increase.
关键词
贫预混燃气轮机燃烧室/氨氢混合燃料/掺氢比/数值模拟/NOx排放Key words
lean premixed gas turbine combustor/ammonia-hydrogen hybrid fuel/hydrogen-doped ratio/numerical simulation/NOx emission引用本文复制引用
出版年
2024
NETL
NSTL
万方数据