发动机进气歧管流场的数值分析  

Numerical simulation on flow field of engine intake manifold

作　　者：黄泽好[1,2] 杨超[1] 黄一桃[1] 姚慎兵[1] 

机构地区：[1]重庆理工大学重庆汽车学院,重庆400054 [2]重庆理工大学汽车零部件制造及检测技术教育部重点实验室,重庆400054

出　　处：《机械设计与制造》2012年第2期156-158,共3页Machinery Design & Manufacture

摘　　要：以某发动机进气歧管为研究对象建立三维模型,运用CFD前处理软件Gambit划分网格,建立进气歧管流场模型,在计算流体动力学软件Fluent中分析各缸进气均匀性,进气歧管的进气阻力,进气歧管的内部流场特性。结果清晰显示各歧管的近壁流速、内部流速、表面总压分布情况,并根据分析结果对进气歧管进行了结构优化,改进后的发动机进气歧管在各缸进口减小总压损失、进气阻力、管二流量等方面取得较明显的效果,管四流量得到提高,各进气管不均匀度得到优化。By taking an engine intake manifold as object of study,a three-dimensional model is es-tablished.And then the meshing of the intake manifold is done by using the computational fluid dynamics pre-processing software Gambit.Meanwhile the inlet gas uniformity,resistance of inlet,characteristic of the flow field are analyzed by the software Fluent,which result shows clearly the velocity of flow approximate the wall,inside wall and exterior pressure distribution the structure of the intake manifold is optimized.A nd s in the manifolds.According to the results of analysis,ignificant improvement effect is achieved in reduction of the pressure loss of cylinders,intake gas flow resistance and the flow rate of the second manifold,thus the fourth flow is increased and the flowing non-uniformity is optimized.

关 键 词：进气歧管 流场分析 FLUENT 优化 

分 类 号：TH16[机械工程—机械制造及自动化] U463[机械工程—车辆工程]