发动机可变进气系统流动特性模拟分析与试验研究  

The Research and Simulation on Flow Characteristic of Variable Intake System of Motorcycle Engine

作　　者：任立红[1] 舒歌群[2] 宋如钢[1] 张宝欢[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试验室,天津300072

出　　处：《汽车工程》2010年第5期383-387,共5页Automotive Engineering

摘　　要：对一1.25L单缸4气门发动机进行可变进气的改进设计,以便优化发动机的中小负荷性能。以初步设计的进气道模型为基础,建立了评价进气道稳流特性的计算模型,对不同进气模式在不同的气门升程下的进气道和缸内流场进行了模拟计算,得出了进气道内的气流分布、流量系数、涡流比和滚流比等参数,并与气道稳流试验数据进行了对比分析。An improving design on the variable intake port of a 1.25L 4 valve single cylinder engine is conducted for optimizing the small and medium load performance of the engine.A computing model for evaluating the steady flow characteristics of intake port is set up based on the intake port model preliminarily designed.And the simulation computations on the intake port and in-cylinder flow fields in different valve lifts under different intake modes are performed and the parameters such as air flow distribution,flow coefficient,swirl ratio and tumble ratio of intake port are obtained,which are compared with test data of the steady flow of intake port.

关 键 词：可变进气 流量系数 涡流比 滚流比 数值模拟 

分 类 号：TK40[动力工程及工程热物理—动力机械及工程]