一种引入二次破碎时间的喷雾贯穿距拟合方法  

A Fitting Method of Spray Penetration Containing Secondary Breakup Time

作　　者：刘建新[1] 刘松[1] 杜慧勇[1] 李民[1] 王站成[1] 徐斌[1] 

机构地区：[1]河南科技大学车辆与动力工程学院,河南洛阳471003

出　　处：《农机化研究》2012年第7期232-235,共4页Journal of Agricultural Mechanization Research

基　　金：河南省杰出人才创新基金项目(104200510006);河南省教育研究创新项目(2006470001;200410464010)

摘　　要：使用频闪摄像装置拍摄了高压共轨条件下电控喷油器在两种喷油压力下的喷雾图片,采用Matlab图像处理工具自动判读了喷雾贯穿距。选用一种引入二次破碎时间的喷雾贯穿距拟合公式对所测贯穿距进行三段式拟合。结果表明:喷油压差越大,一次破碎和二次破碎时间都提前。前者的原因是气液相对速度的增大,而后者的原因是高速界面运动产生的界面加速度的增大。The fuel spray images were taken with an equipment(camera-flash-injection) which has been synchronized with a purpose made electronic system under the condition of the high pressure common rail in two injection pressure has been expressed in this paper.A spray penetration fitting formula containing secondary breakup time to fit penetration in three sections was proposed also.Results show that when pressure difference increase,both first and second breakup time become earlier.The former is because of gas-liquid relative velocity increasing,while the latter is due to high speed interface movement acceleration increasing.

关 键 词：共轨 喷雾贯穿距 二次破碎 拟合方法 

分 类 号：TK421.4[动力工程及工程热物理—动力机械及工程]