内燃机工程2018，Vol.39Issue(2)：35-42,8.DOI:10.13949/j.cnki.nrjgc.2018.02.006
内/外交叉孔喷嘴内部和近场流动特性的试验
An Experimental Study on the Internal and Near-Field Flow Characteristics of Internal/External Intersecting-Hole Nozzles
摘要
Abstract
In order to understand the internal cavitation flow and near-field spray characteristics of injector nozzles with internal/external intersecting-holes,three types of nozzles,including two different intersecting hole nozzles and one conventional cylindrical hole nozzle were visualized by using high speed photography at different injections pressures,sub-hole impact angle and sub-hole center-to-center distance. Results show that,unlike the paraxial symmetric spray from the conventional cylindrical hole nozzle,the internal/external intersecting-hole nozzle can create a fan-shaped spray due to internal/external spray impingements.As observed,the spray from the external intersecting-hole nozzle shows a very intensive radial diffusibility followed by that of the internal intersecting-hole nozzles and both of which are more diffusible than that of conventional cylindrical hole nozzle.In addition,as the injection pressure increases, the conventional nozzle produces cavitation at 0.3 Mpa,which rapidly develops into a hydraulic plunger flow, and the external intersecting hole nozzle also generates cavitation at 0.3 Mpa,but no hydraulic plunger flow occurs at 0.1 Mpa.While the internal intersecting hole nozzle has no cavitation at all.关键词
喷嘴/交叉孔/碰撞/交叉角度/内部流动/近场喷雾Key words
nozzle/intersecting-hole/impingement/impact angle/internal flow/near-field spray分类
能源科技引用本文复制引用
金煜,冷先银,陈广平,王谦,何志霞..内/外交叉孔喷嘴内部和近场流动特性的试验[J].内燃机工程,2018,39(2):35-42,8.基金项目
江苏省自然科学基金资助项目(BK20130514,BK20161349) （BK20130514,BK20161349）
江苏省研究生培养创新工程项目(SJLX15_0492)Natural Science Foundation of Jiangsu Province(BK20130514,BK20161349) （SJLX15_0492）
Innovative Cultivation Project for Graduate Students of Jiangsu Province(SJLX15_0492) （SJLX15_0492）
