基于特征矢量的四气门汽油机缸内流场分析  

Eigenvector-Based Research on In-Cylinder Flow Field of 4-Valves Gasoline Engines

作　　者：胡春明[1,2] 吕永[1,2] 詹樟松 刘斌 张巍[1] 于勇[1] 武珊[1] 

机构地区：[1]天津大学内燃机研究所,天津300072 [2]天津大学内燃机燃烧学国家重点实验室,天津300072 [3]重庆长安汽车股份有限公司,重庆400020

出　　处：《燃烧科学与技术》2012年第3期223-227,共5页Journal of Combustion Science and Technology

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

摘　　要：基于双特征角的新型气道试验台,对四气门电喷汽油机缸内不同测试平面内气流运动强度及矢量方向进行综合分析.建立了进气道稳流特性的计算模型,并进行了缸内流场仿真计算.对比计算结果及试验结果可知,该测试平台具有很好的重复性及准确性,能够对发动机缸内任意测试平面内的气流运动进行测量及评价,并利用缸内气流运动特征矢量轨迹及矢量图,宏观地反映缸内气体流场的真实情况,为发动机进气道优化改进提供数据基础.A novel double eigenangle-based steady-state flow test rig to measure port generated air flow inside a cylinder head has been developed. A 4-valve EFI gasoline engine cylinder head was investigated comprehensively by this new instrument. A simulation model for characterizing in-cylinder air motion was built up, and the CFD simula- tion was performed on in-cylinder air motion. The comparison between simulation and tested results show that the comprehensive characterization of air motion on any testing plane can be obtained by this new instrument; besides, the macroscopic analysis of in-cylinder air motion with the map of eigenvector path can be made to modify the engine inlet port.

关 键 词：新型气道试验台 缸内气体流动 测试平面 特征矢量轨迹 矢量图 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]