油束空间分布锥角对柴油可控预混压燃燃烧排放影响的试验研究  

Study on the Effect of Fuel Beam Distribution Cone Angle on Emission of Diesel Premixed Combustion

作　　者：林铁坚[1] 苏万华[1] 裴毅强[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室

出　　处：《汽车技术》2006年第11期31-35,共5页Automobile Technology

摘　　要：在柴油可控预混压燃燃烧模式下,进行了油束空间分布锥角及多脉冲参数对排放影响的研究。试验结果表明,在采用155°和125°油束空间分布锥角的两种油嘴时,通过改变多脉冲喷射定时均可控制预混燃烧放热幅度,但对NOx、HC和CO排放的影响不同;在3次和6次多脉冲喷射条件下,采用小分布锥角(125°)油嘴能够增加有效贯穿距离,提高气缸轴线方向的空气利用率,从而在大脉冲喷射定时条件下改善CO排放,并且可减少50%以上的HC排放。In the mode of diesel premixed combustion,we research the effects of fuel beam distribution cone angle and multi-pulse parameters on emission.The test results show that the nozzles with 155°and 125°fuel beam distribution cone angle can both control the heat release rate by changing multi-pulse timing,hut the effect on the emission of NOx,HC and CO is different;in the condition of 3 to 6 times multi-pusle injection,the nozzle with small distribution cone angle （125° ）can add the penetrating distance and increase the air utilization rate along cylinder axis direction,thus can reduce the CO emission,and reduce 50 % HC emission in the condition of large pulse injection timing.

关 键 词：柴油机 预混压燃 油束分布 喷锥角 多脉冲喷射 

分 类 号：TK16[动力工程及工程热物理—热能工程]