基于特征矢量的汽油机缸内气流运动特性研究  

Eigenvector-based Research on In-cylinder Flow Field of Gasoline Engines

作　　者：侯圣智[1] 吕永[1] 詹樟松 刘斌 张巍[1] 于勇[1] 

机构地区：[1]天津大学内燃机研究所,天津300072 [2]重庆长安汽车股份有限公司,重庆400020

出　　处：《农业机械学报》2012年第3期5-9,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA11A114)

摘　　要：运用基于双特征角的气道稳流测试系统,对四气门电喷汽油机缸内不同测试平面内的气流运动进行了试验、分析及评价。引入特征矢量的概念,利用缸内滚流运动矢量轨迹图及不同气门升程下发动机缸内气流运动特征矢量表,分析了缸内不同气流运动形式的气流强度、作用平面、矢量方向,宏观地反映了缸内气体流场的运动特性及分布规律。在发动机进气系统的优化过程中,为组织缸内气流最优化作用区域及适当强度的气流运动,改善汽油机性能提供了新的方法和全面的数据依据。A novel double eigen angle-based steady-state flow test rig to comprehensively investigate port generated air flow inside a 4-valve EFI gasoline engine cylinder head was developed. The concept of eigenvector was introduced and the eigenvector path of the in-cylinder tumble flow was protracted; besides, the eigenvector table under different valve lifts in the dummy cylinder was shown to get a macroscopical reflection of the intensity, the tested plane, the vector direction and the distribution of the inclined swirl. In the process of the optimizing the intake system of the engine, a new methodology and comprehensive data basis were provided to organize the optimization the regional and the strength of the appropriate in-cylinder air movement, and improve the performance of the engine.

关 键 词：汽油机 气道稳流测试系统 特征矢量 气流运动 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]