化油器-进气管-缸内系统三维稳流数值模拟研究  

Three-dimensional Steady Flow Numerical Simulation in the Carburetor-intake Pipe-cylinder System of Gasoline Engine

作　　者：蒋炎坤[1] 陈小东[1] 张煜盛 陈国华[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074

出　　处：《武汉理工大学学报》2003年第10期68-70,共3页Journal of Wuhan University of Technology

基　　金：国家 973项目 (0 0 1CB2 0 92 0 7)

摘　　要：对 CU B10 0四冲程汽油机化油器 -进气管 -缸内系统的三维稳态数值模拟 ,发现均匀气流进入化油器后 ,速度迅速增加 ,化油器腔体内出现强度不很大的对称双涡结构 ,喷嘴两侧和柱塞两侧均出现回流 ,腔体内部气流无脱体现象。进气管内气流波动并呈现双涡结构。气门盘下产生明显的回流区 ,且受到气缸壁限制 ,在进气门左、右侧各形成一对反向旋涡。距缸盖底面The three dimensional steady flow characteristic in the carburetor intake pipe cylinder of the gasoline engine is analyzed. The research results reveal that the airflow velocity is promptly increased during it enters carburetor. There are a twin symmetry feebleness vortices in carburetor cavity and the loop flow in two sides of nozzle and plunger. The airflow is fluctuating and the double eddy structure is discovered in intake pipe. The obvious loop flow region forms under valve and the reverse vortices forms in right and left sides of intake valve. The asymmetric velocity still exists on the cross section located the 2 diameter distance form cylinder head bottom.

关 键 词：发动机 进气系统 三维稳流 数值模拟 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]