摘要
为了研究“高低型双涡流室双缩口燃烧室”柴油机的高原排放特性,运用AVL Fire对某高原柴油机改用“高低型双涡流室双缩口燃烧室”,并进行在海拔4500 m的模拟燃烧。结果表明:相对于原型ω燃烧室,“高低型双涡流室双缩口燃烧室”能够同时降低NO x与碳烟(SOOT)排放量。为了进一步优化“高低型双涡流室双缩口燃烧室”的高原排放性能,设置了不同的径深比、高低涡流室半径比与不同的喷油夹角,进行计算。结果表明:在计算范围内,随着该型燃烧室的最大径深比的增大,NO x排放量先下降后上升,SOOT排放量先上升后下降;随着高低涡流室半径比的增大,柴油机的NO x排放量先降低后增大,而SOOT排放量一直下降;随着喷油夹角的升高,该燃烧室的NO x排放量先下降后上升再下降,最后再升高,呈W形趋势,而SOOT排放量则先升高,后降低。研究结果为用于高海拔地区的“高低型双涡流室双缩口燃烧室”提供了设计参考。
To study the emissions performance of the combustion chamber with a higher and a lower(CCHL)reentrant swirl chamber in high altitude areas,AVL Fire was applied to switch CCHL to some diesel engine to simulate the combustion at altitude of 4500 meters.The results indicate that CCHL can produce less emissions of NO x and SOOT simultaneously than the original combustion chamber.In order to further optimize CCHL s emissions performance in high altitude areas,factors as different depth-diameter ratios,different high-low swirl chamber s radius ratios and different nozzle hole cone angels were set to simulate the combustion.And the results shows that within the range of calculation,with the maximums of depth-diameter ratios increasing,NO x emissions go down first and then up,as SOOT emissions go up first but then down.Besides,with the maximums of high-low swirl chamber s radius ratio,NO x emissions go down first but then up,while the SOOT emissions falls gradually.Furthermore,with the increasing of nozzle hole cone angel,the NO x emissions go down first and then up,but down again,and finally up,with a trend w shape.While the SOOT emissions first go up but then down.The research provides a reference for the CCHL used in high altitude areas.
作者
李毅
苏石川
徐华平
刘薇
吴中正
臧瑞斌
LI Yi;SU Shi-chuan;XU Hua-ping;LIU Wei;WU Zhong-zheng;ZANG Rui-bin(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;Changzhou FRP Boatbuilding Co.,Ltd.,Changzhou 213127,China)
出处
《科学技术与工程》
北大核心
2021年第11期4452-4459,共8页
Science Technology and Engineering
基金
军事装备预研项目(30110030402)。
关键词
柴油机
高海拔
排放
径深比
半径比
喷油夹角
diesel engine
high altitude
emission
ratio of diameter to depth
ratio of radius
nozzle hole cone angle
