某增压直喷汽油机进气道开发  

Development of intake port for a turbocharged direct injection gasoline engine

作　　者：张宗澜 陈泓 林思聪 刘明嘉 杜家坤 李钰怀 ZHANG Zonglan;CHEN Hong;LIN Sicong;LIU Mingjia;DU Jiakun;LI Yuhuai(Automotive Engineering Institute,Guangzhou Automobile Group Co.,Ltd.,Guangzhou 511434,China)

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广东广州511434

出　　处：《内燃机与动力装置》2021年第3期13-18,共6页Internal Combustion Engine & Powerplant

基　　金：国家重点研发计划项目(2017YFB0103300)。

摘　　要：针对某2.0 L增压直喷汽油机,设计了2种进气道方案,通过试制进气道芯盒,采用气道三维粒子图像测速(three-dimensional particle image velocimetry,3D-PIV)试验与三维仿真相结合的方式,分析进气道性能及进气道对缸内流动的影响。结果表明:进气道切入角是气道开发的关键参数,合适的切入角可以提高进气道滚流比,燃烧室进气门遮蔽面能大幅提高小升程下的滚流比;内外切入角为0°的进气道性能更优,平均流量系数和平均滚流比分别为0.264、3.2,满足进气道性能开发目标;且与燃烧室、活塞顶匹配更好,可以获得较高的缸内瞬态滚流、湍动能及更合理的湍动能分布。Two intake port schemes are designed for a 2.0 L turbocharged direct injection gasoline engine.In combination with intake port core box,3D-PIV test and 3D simulation are used to evaluate the performance of intake port and the influence of intake port on in-cylinder flow.The results show that the entry angles are key parameters in the design of intake port,appropriate entry angle improving the tumble ratio,and the shrouded surface of the inlet valve in the combustion chamber can significantly improve the tumble ratio at small valve lift.The intake port with 0° entry angle has better performance,and the average flow coefficient and average tumble ratio are 0.264 and 3.2 respectively,which is well matched with the combustion chamber and piston crown.Higher transient tumble in cylinder and turbulent kinetic energy are achieved,as well as better distribution of turbulent kinetic energy.

关 键 词：汽油机 进气道 3D-PIV 滚流比 缸内流动 

分 类 号：TK413.45[动力工程及工程热物理—动力机械及工程]