轴针式喷油嘴燃油束撞击时雾化特性研究  

Investigation in Characteristics of the Fuel Spray Formed by Impingement on a Pintle Nozzle

作　　者：姚春德[1] 息树和[1] 岳勇[1] 王宝亮 王海[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《燃烧科学与技术》2000年第2期170-174,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目!(5 96 76 0 2 )

摘　　要：在前期发动机台架实验和高速摄影实验的研究基础上 ,为进一步了解燃油束撞击法形成混合气及其在小型柴油机上实现直喷式燃烧的机理 ,用多次喷雾叠加摄影技术以及马尔文激光粒子分析仪对带挡块的轴针式喷油器的喷雾过程进行了研究。实验中对不同形状挡块以及不带挡块的油束形成过程进行了详细的观察 ,并对撞击前后的油滴滴径进行了测量。结果表明 ,燃油经撞击后可显著地增大油束扩散角 ,不同程度地影响了燃油束的贯穿度 ,但燃油束撞击前后的滴径变化不大。加深了对油束撞击现象。Based on the experimental results obtained from an engine testing and on the pictures of combustion process by high speed photography,characteristics of the fuel spray formed by impinging on a pintle nozzle was investigated in the way of multiple sprays overlapping photography and a Malvin analyzer for drop size and distribution.The work included the observation of jet development of the fuel spray and the measurement of the fuel drop size and so on.The experimental results show that,by fuel jet impinging on the head tip at a pintle nozzle,the fuel spray diffusion angle had been enlarged and its penetration much shortened,but the drop sizes remained almost unchanged. [WT5”HZ]

关 键 词：轴针式喷油嘴 燃油束撞击 雾化 柴油机 

分 类 号：TK421.43[动力工程及工程热物理—动力机械及工程]