喷嘴结构对多孔喷油器喷射特性影响的研究  

Study on Influence of Nozzle Geometric Parameters on Injection Characteristic of Multi-Hole Injector

作　　者：邵利民[1,2] 常汉宝[1] 周加东[1,3] 金华军[3] 施文杰[3] 

机构地区：[1]海军工程大学船舶与动力学院 [2]海军上海地区装备修理监修室 [3]中国人民解放军海军91860部队

出　　处：《内燃机工程》2010年第6期43-48,共6页Chinese Internal Combustion Engine Engineering

基　　金：国防"十一五"预研项目(4010103010401)

摘　　要：利用EFS8246单次喷射测量系统和高速闪光摄影系统对不同结构参数的非轴对称喷嘴的喷油规律和油束形态进行了试验研究。利用CFD软件Fire的两相流模型对各喷嘴内部流动和气蚀现象进行了仿真模拟。喷嘴结构参数包括喷孔数、喷孔直径、喷孔夹角和喷孔长径比。研究结果表明:各结构参数对喷嘴流量系数、雾束形态、各孔间流量差异、各次喷射的一致性均有不同程度的影响,而具体的影响程度由压力室和喷孔内的气穴强度决定。The experimental study was carried out to analyze the influence of asymmetrical nozzle geometric parameters on its injection rate and spray shape using EFS8246 instantaneous fuel mass instrument and high speed flash photographic system,and the internal flow field and cavitations in nozzle holes were researched by the CFD code FIRE based on two-phase flow model.The nozzle geometric parameters included hole number and diameter,hole angle and hole length-diameter ratio（L/D）.Results show that these geometric parameters of nozzle influence in varying degrees on flow coefficient,spray shape,fuel flow difference among holes and cycle-to-cycle variations of fuel mass,the magnitude is dependent on the cavitation intension inside the nozzle hole and pressure sac.

关 键 词：内燃机 非轴对称喷嘴 喷油规律 喷雾形态 空穴 三维数值模拟 

分 类 号：TK423.8[动力工程及工程热物理—动力机械及工程]