汽油发动机进气道结构对缸内流动的影响  

Influence of Intake Port Configuration of Gasoline Engine on In-Cylinder Flow

作　　者：郑晓丰 陈超 卢晶晶 章杰 ZHENG Xiaofeng;CHEN Chao;LU Jingjing;ZHANG Jie(Ningbo Yinzhou DLT Technology Co.,Ltd.,Ningbo,Zhejiang,315000,China)

机构地区：[1]宁波市鄞州德来特技术有限公司,浙江宁波315000

出　　处：《小型内燃机与车辆技术》2024年第2期27-31,共5页Small Internal Combustion Engine and Vehicle Technique

摘　　要：采用稳态数值模拟,对某型汽油发动机的两个进气道设计方案进行计算,并将仿真结果和试验数据进行了对比。同时,对两个设计方案的发动机缸内流动进行了瞬态模拟,结果表明:进气道的仿真结果和试验数据具有良好的一致性,两者偏离程度在5%以内,优化后气道的流量系数和滚流比同时得到了提升;优化结构下的缸内流动效果改善显著,进气阶段和点火时刻的缸内平均湍动能得到明显提升,更有利于均质混合气的产生和改善燃烧效果。Two different intake ports of gasoline engine were studied through steady numerical simulation and experiment and the test data were compared with the simulation data.Meanwhile,the transient simulation technology was applied to calculate the in-cylinder flow field.The results show that the data of the simulation show good agreement with the test data,and the deviation degree of the two is less than 5%.And the flow coefficient and the tumble ratio of the optimized intake port are improved.The increase of the average turbulent kinetic energy in cylinder at the intake stage and ignition time is conducive to the generation of homogeneous mixture of air and fuel and the in-cylinder combustion improvement,which is due to the optimal design of the structure.

关 键 词：数值模拟 进气道结构 缸内流动 湍动能 

分 类 号：TK412.2[动力工程及工程热物理—动力机械及工程]