静电喷雾高压喷射下喷雾特性的研究  

Study of Electro-Spray Characteristics under High-Pressure Injection

作　　者：于水[1] 胡宗杰[1] 邓俊[1] 张旭升[1] 黄成杰[1] 李理光[2] 

机构地区：[1]上海交通大学动力与机械工程教育部重点实验室,上海200030 [2]同济大学汽车学院,上海201804

出　　处：《内燃机学报》2006年第5期434-439,共6页Transactions of Csice

基　　金：国家重点基础研究计划资助项目(2001CB209201)

摘　　要：静电喷雾技术通过液体荷电来改善液体雾化质量,该技术有望在较低压力下获得与高压喷射相当甚至更优的雾化质量,或与高压喷射相结合获得更好的雾化质量以进一步改善内燃机性能。将静电喷雾技术在泵—管—嘴喷射系统上进行了实验,对高压喷射下柴油的静电喷雾瞬态喷雾特性进行了研究。荷电后可观察到静电喷雾分层喷雾的特征,喷雾中后期扭曲并且湍流增强,喷雾径向宽度增大,后喷液柱消失;荷电后喷雾前端粒径的均匀度得到改善。Electro-spray utilizes the electrostatic charging for the improvement of liquid atomization, and this technique possesses the potential for improving spray atomization under low injection pressure and/or acquiring better spray with combination of high-pressure injection to improve the engine performance. In this study, electro-spray was implemented based on productior, pump-pipe-nozzle fuel system, and the transient characteristics of diesel electro-spray was investigated. By charging, the stratified feature of electro-spray was observed, and turbulence was intensified in the metaphase of spray. Radial width of increased and post injection vanished. Meanwhile, uniformity of droplets Keywords in spray tip was improved.

关 键 词：静电喷雾 高压喷射 瞬态喷雾特性 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]