农业机械学报2013，Vol.44Issue(3)：6-11,6.DOI:10.6041/j.issn.1000-1298.2013.03.002
直喷汽油机多孔喷油器喷嘴内部流动数值模拟
Numerical Simulation of Nozzle Flow in GDI Multi-hole Injector
摘要
Abstract
The two-fluid method using linear cavitation model was utilized to simulate GDI multi-hole injector nozzle flow. The evolutionary law of the cavitation flow pattern was analyzed. Cavitation criterions were summarized and compared. Results showed that cavitation was formed at the hole corner and the gap between the moving needle and valve seat. Cavitation flow pattern was unstable and changed with time. Nozzle flow rate decreased and while exit velocity increased due to the cavitation. Also each hole flow rate was different. The critical cavitation number was efficient to predict the cavitation. The non-cavitation flow of GDI multi-hole injector could only be appeared when the injector worked in low injection pressure and high ambient pressure for stratified combustion applications.关键词
汽油机/直接喷射/多孔喷嘴/空化流动/数值模拟Key words
Gasoline/Direct injection/Multi-hole injector/Cavitation flow/Numerical simulation分类
能源科技引用本文复制引用
丁红元,刘芬,黄荣华,王兆文,李智..直喷汽油机多孔喷油器喷嘴内部流动数值模拟[J].农业机械学报,2013,44(3):6-11,6.基金项目
国家高技术研究发展计划(863计划)资助项目(2008AA11A121) （863计划）
