Indexed by:会议论文
Date of Publication:2015-08-17
Page Number:1165-1174
Key Words:汽车燃料;活性控制压燃发动机;燃烧特性;排放特性
Abstract:本文利用多维CFD模型工具,详细探讨了汽车燃料的化学特性对RCCI发动机的燃烧和排放特性的影响.通过设置燃油经济性和声响强度两条限制边界,得到了汽油/柴油RCCI和甲醇/柴油RCCI在不同初始温度下CA50的最优运行区间.结果显示,对于甲醇/柴油RCCI,由于其较快的燃烧速率,因此其需要更加延迟的CA50时刻从而避免过高的RI.由于缩短的燃烧持续期,更高的燃烧效率,更低的换热损失,甲醇/柴油RCCI发动机的燃油经济性要优于汽油/柴油RCCI.可以通过增加预混合燃油的比例,来消除EISFC和RI之间存在的此消彼长的关系.对于甲醇/柴油RCCI,其较晚的CA50时刻是其CA50对初始温度变化敏感的主要原因.此外,甲醇/柴油RCCI比较微弱的低温放热反应同样不利于发动机运行的稳定性.在RCCI燃烧中,只要保证足够高的预混燃油比例,即可实现较低NOx排放的目标.
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Associate Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:大连理工大学
Degree:Doctoral Degree
School/Department:能源与动力学院
Discipline:Power Engineering and Engineering Thermophysics
Business Address:能源与动力学院809
Contact Information:15140422034
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