船用柴油机Urea-SCR系统喷雾特性试验研究  

Experimental investigation on spray characteristics of the Urea-SCR system for marine diesel engines

作　　者：马哲树[1] 刘吉财[1] 刘少俊[1] 陈苏蓉[1] 侯小宇 

机构地区：[1]江苏科技大学能源与动力工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2015年第6期536-539,共4页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学青年基金资助项目(51306079);江苏省高校自然科学基金资助项目(12KJB470005);江苏省高校优秀中青年教师和校长境外研修基金资助项目

摘　　要：针对某型柴油机满足IMO Tier Ⅲ标准的要求,设计了两种（内混式和外混式）双流体喷嘴,并自行搭建了喷嘴雾化性能的试验台.对内混式和外混式两种喷嘴在不同的气体压力、液体流量、喷孔数量下的雾化特性进行了大量的试验研究.结果表明：随着气体压力的增大,雾化均匀性变差,当气体压力在0.3~0.4 MPa时,雾化均匀性最好;随着被雾化液体流量的增加,雾化的分布更加均匀;当喷孔数目为4个时,喷雾分布均匀性最好.综合两种双流体喷嘴的雾化特性,外混式双流体喷嘴的雾化锥角更大,雾炬更饱满.In order to satisfy IMO Tier Ⅲ standard for a marine diesel engine,two kinds of twin-fluid nozzles（ internal-mixed and external-mixed） were designed and investigated experimentally. Atomization effects of the internal-mixed nozzle and the external-mixed nozzle were studied by tests. The experiments were conducted under three kinds of circumstances： different gas pressure,liquid flow and orifice quantity. The atomizing experimental results show that with the increase of gas pressure,the uniformity of atomization becomes worse; when the gas pressure is from 0. 3 to 0. 4 MPa,the atomization uniformity is the best; with the increase of the liquid flow,the distribution of atomization becomes uniform; when the orifice number is 4,the distribution of atomization achieves the best result. For the two twin-fluid nozzles,the atomizing cone angle of the external-mixed one is larger and its spray is full.

关 键 词：船用柴油机 SCR 双流体喷嘴 雾化 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]