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

作　　者：王彬彬 胡登 王贺春[1] 杨传雷[1] 王银燕[1] WANG Binbin;HU Deng;WANG Hechun;YANG Chuanlei;WANG Yinyan(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2024年第6期1102-1110,共9页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52171298);博士研究生科研创新基金项目(3072023GIP0303)。

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,NO_(x)排放升高,CO_(2)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,NO_(x)排放升高4倍,燃烧前后CO_(2)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。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 cylinder,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 preliminarily 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,ammonia escape proportion decreases,NO_(x) emission increases,CO_(2) emission increases by 0%,and soot and HC emissions 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,NO_(x) emission increases by fourfold,and CO_(2) emission increases by 0% before and after combustion.After the hydrogen 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 

分 类 号：U664.121[交通运输工程—船舶及航道工程]