柴油机燃油喷雾动量的测量与分析  

Measurement and Analysis on Momentum of Spray of Diesel Engine

作　　者：刘建新[1] 杜慧勇[1] 李民[1] 宗永平[1] 赵致和[1] 

机构地区：[1]洛阳工学院汽车工程系,河南洛阳471003

出　　处：《洛阳工学院学报》2002年第3期48-50,共3页Journal of Luoyang Institute of Technology

基　　金："九五"国家重点科技攻关项目 (9612 0 3 80 1) ;河南省重大科技攻关项目 (0 0 1110 113 )

摘　　要：在喷油泵试验台上 ,利用自制的油束动量测量装置测取喷油嘴喷出油束的动量 ,以研究柴油机燃油喷雾特性。其方法为测量油束对传感器的冲击力来获取油束的瞬时冲量 ;通过对一次喷油过程中的冲量求和 ,便可计算出冲击传感器这部分油束的总动量。用此方法对一种 4孔喷油嘴的油束动量及油束内动量分布进行的测量表明 ,各喷孔油束动量大小与其空间角度有关 ,喷孔与喷油嘴轴线间的夹角越小则油束动量越大 ;油束内的油滴动量主要集中在油束核心区域 ,针阀的头部形状不仅影响油束核心区动量的大小 ,也影响油束内的动量分布。In order to study the characteristic of the oil spray of diesel engine, an experiment on the spray momentum measured with self made apparatus was done in a pump test-bed. Instantaneous momentum is obtained by measuring the impact force of spray to sensor. The whole momentum of spray can be also obtained by summing up the instantaneous momentum of an injection process. The results of the measurement on a 4 hole nozzle's spray momentum showed that the value of each spray relates to the angles of holes; the smaller the angle between hole and nozzle axis,the larger the spray momentum; most of the spray momentum concentrates in the kernel of spray; needle's shape influences not only the value of spray kernel momentum, but also its distribution.

关 键 词：柴油机 燃油喷雾 动量 测量原理 油束 

分 类 号：TK423.84[动力工程及工程热物理—动力机械及工程]