二甲醚燃料喷射压力对喷雾发展过程的影响  

Effect of Dimethyl Ether Injection Pressure on Fuel Spray Process

作　　者：宋文鹏[1,2] 张光德[1,2] 孙敬[1,3] 赵慧勇[1,2] 马骏[1] 

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081 [2]湖北汽车工业学院汽车动力传动与电子控制湖北省重点实验室,湖北十堰442002 [3]茨城大学理工学研究科,日本茨城3160036

出　　处：《车用发动机》2015年第3期51-54,共4页Vehicle Engine

基　　金：汽车动力传动与电子控制湖北省重点实验室(湖北汽车工业学院)开放基金项目(ZDK201212);国家自然科学基金项目(50975212);“汽车零部件技术湖北省协同创新中心”研究平台

摘　　要：利用定容容器模拟增压发动机缸内高温高压条件,利用高速摄像机观察二甲醚喷雾,探讨了喷射压力对喷雾贯穿距离、喷雾蒸发等喷雾发展过程的影响规律。结果表明:在喷射初期喷雾贯穿距离与喷射时间成正比关系,在喷射后期,环境气体卷入喷雾中,喷雾贯穿距离与喷射时间平方根成正比关系;二甲醚燃料液态喷雾贯穿距离相对于气态来说非常短,DME液态喷雾贯穿距离基本不随时间的增加而增长。In‐cylinder high temperature and high pressure condition of supercharged engine was simulated by using constant volume vessel ,the dimethyl ether spray was observed by using a high speed camera and the effect of injection pressure on the spray process such as spray penetration and spray evaporation was discussed .The results show that the spray penetration is proportional to the injection time in the early injection period and proportional to the square root of injection time during the late injection period due to the mixing of spray with ambient air .Compared with the gaseous dimethyl ether ,the liquid spray pene‐tration of dimethyl ether is much shorter and does not increase with the increase of time .

关 键 词：二甲醚 喷雾贯穿距 燃油雾化 喷射压力 

分 类 号：TK411.71[动力工程及工程热物理—动力机械及工程]