摘要
基于三维CFD仿真软件FIRE,建立单缸进气歧管喷射的氢内燃机三维仿真模型,在验证仿真模型的有效性的基础上,重点研究了点火提前角和当量燃空比对氢内燃机燃烧及排放的影响。分析结果表明,推迟点火提前角,缸内最高压力不断增大。提高当量比会使燃烧放热率升高,燃烧持续期缩短,但过大的当量比易发生异常燃烧。延迟点火并配合稀燃技术可以降低NOx排放。
Based on three-dimensional CFD simulation software FIRE, a single-cylinder intake manifold injection hydrogen fueled engine 3D simulation mode I is established. After verifying the validity of the simulation model, the paper focuses on the ignition advance angle and equivalent fuel-air ratio, which have great influence on the hydrogen fueled engines combustion and emissions. The analysis results show that delayed ignition advance Angle, the highest in cylinder pressure increasing. Improving the equivalent ratio can make the combustion heat release rate increases, combustion duration shorten, but it is easy for big equivalent ratio to happen abnormal combustion. Delayed ignition and matching with dilute combustion technology can reduce NOx emission.
出处
《内燃机》
2013年第2期8-11,共4页
Internal Combustion Engines
基金
国家自然学基金(项目编号51076046)
关键词
氢内燃机
燃烧过程模拟
点火提前角
当量比
hydrogen fueled engines
simulation of combustion process
ignition advanced angle
equivalent ratio
