摘要
采用废气再循环(EGR)技术的多缸柴油机,EGR率在各缸的均匀分布能有效保证燃烧质量,优化排放。通过改进某四缸柴油机EGR出口管路的结构,建立进气管路的一维与三维模型,给出模拟仿真分析过程,运用一维整机性能分析软件GT-Power与三维CFD软件AVL Fire分别对新旧2种进气歧管进行1D-3D耦合分析,得出优化后管路EGR最大偏差率8.99%,明显小于原始管路44.79%的EGR最大偏差率,优化管路更有利于EGR率的均匀分配。
For multi-cylinder diesel engine with EGR technology,even distribution of EGR rate in each cylinder could ensure good combustion quality and emission.The structure of the prototype EGR outlet pipe of one four-cylinder diesel engine was optimized and the intake manifold 1D and 3D models were established,one-dimensional analysis software GT-Power and 3D CFD software AVL Fire are used to carry out the 1D-3D coupling results between the two kinds of models,including the simulation analysis process,and the results of optimization analysis.The results indicated that EGR rate of the optimized piping was 8.99%,which was obviously better than 44.79%,the optimized piping was better for the even distribution of the EGR rate.
出处
《南昌大学学报（工科版）》
CAS
2013年第2期168-171,共4页
Journal of Nanchang University(Engineering & Technology)
基金
江西省工业支撑资助项目(2009BGA01800)
关键词
废气再循环率
均匀分配
结构优化
仿真
1D-3D耦合分析
exhaust gas recycle rate
even distribution
structural optimization
simulation
1D-3D coupling analysis
