不同引燃方式下氨掺氢燃烧对发动机的性能影响
Effect of ammonia blended with hydrogen combustion on diesel engine performance under different ignition modes
王彬彬 1胡登 1王贺春 1杨传雷 1王银燕1
作者信息
- 1. 哈尔滨工程大学 动力与能源工程学院,黑龙江 哈尔滨 150001
- 折叠
摘要
氨被认为是最有前景的零碳燃料之一,但掺氨量过大时氨逃逸现象严重,故将氨中掺混一定比例氢气,促进缸内燃烧反应进行,并将引燃柴油替换成氢气实现零碳燃烧.本文使用CONVERGE软件进行仿真,模拟了柴油引燃与氢气引燃时,氨掺氢对发动机燃烧和排放性能的影响.研究发现在柴油引燃时,当掺氢比为 30%时与 0 时相比,缸内爆压、功率升高,燃油消耗率下降,氨逃逸占比下降,NOx 排放升高,CO2 零增长,soot、HC等排放改善;在氢气引燃时,当掺氢比为 30%时与 0 时相比,缸内爆压、功率升高,燃油消耗率下降,氨逃逸占比下降,NOx 排放升高 4 倍,燃烧前后CO2 零增长,掺氢燃烧后改善了发动机整体性能,柴油引燃模式缸内直喷氨气掺混 30%氢是实现净零碳排放较优方案.研究结果为氨燃料的实用性提供了依据,并可用于指导试验研究.
Abstract
Ammonia is a promising zero-carbon fuel.However,when its amount is too large,it will escape rapidly.Therefore,ammonia is mixed with a certain proportion of hydrogen to promote the combustion reaction in the cylin-der,and the pilot diesel is replaced by hydrogen to achieve zero-carbon combustion.Herein,the effect of ammonia and hydrogen on engine combustion and emission performance during diesel ignition and hydrogen ignition is pre-liminarily simulated using CONVERGE software.During diesel ignition—when the hydrogen blending ratio is 30%,compared with 0—the in-cylinder detonation pressure and power increase,fuel consumption rate decreases,ammo-nia escape proportion decreases,NOx emission increases,CO2 emission increases by 0%,and soot and HC emis-sions are improved.During hydrogen ignition,when the hydrogen mixing ratio is 30%,compared with 0%,the in-cylinder detonation pressure and power increase,fuel consumption rate decreases,ammonia escape ratio decreases,NOx emission increases by fourfold,and CO2 emission increases by 0%before and after combustion.After the hy-drogen mixing combustion,the overall performance of the diesel engine is improved.As for the diesel ignition mode,the in-cylinder direct injection of ammonia mixed with 30%hydrogen is a better scheme to achieve net-zero-carbon emission.Results provide a basis for the practicality of ammonia fuel and can be used to guide experimental research.
关键词
发动机/柴油引燃/氢气引燃/氨气/氢气/燃烧性能/排放性能/氨逃逸Key words
engine/diesel ignition/hydrogen ignition/ammonia/hydrogen/combustion performance/emission performance/ammonia escape引用本文复制引用
基金项目
国家自然科学基金(52171298)
博士研究生科研创新基金(3072023GIP0303)
出版年
2024
国家科技期刊平台
NSTL
万方数据