进气系统空气流量计布置数值研究  

Numerical Research on Air Flow Meter Layout of Intake System

作　　者：于洋磊 胡见 曾志新 董愚 YU Yanglei;HU Jian;ZENG Zhixin;DONG Yu(GAC Automotive Research&Development Center,Guangzhou Guangdong 511434,China)

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广东广州511434

出　　处：《汽车零部件》2021年第1期19-23,共5页Automobile Parts

摘　　要：为揭示流场对进气系统空气流量计的影响,基于标准k-ε湍流模型,利用STAR-CCM+对不同插入角度、深度、轴向位置、管路入口圆角半径等因素影响下的空气流量计性能进行了系统研究,并与试验进行对比验证了数值方法的可行性。研究表明:插入角度和深度对速度偏差影响明显,且在高流量区,速度偏差相对更小;存在最佳插入角度和最佳插入深度区间,使得不同流量下的速度偏差均较小;轴向距离对速度偏差影响极大,最大与最小速度偏差之差为42.51%,且湍流强度随轴向距离增加而呈增大趋势;不是一味增大就可减小速度偏差,存在最佳圆角半径使得速度偏差在不同流量下均为最小。In order to reveal the influence of the flow field on the AFM(Air Flow Meter)of an engine intake system,systematic studies on performance of the AFM under different insertion angles,depths,axial positions and pipe fillet radius were conducted by using STAR-CCM+software based on standard k-εturbulence model.And the feasibility of the numerical method was verified by comparison with experiments.The research shows that insertion angle and depth have significant effect on velocity deviation,and in the strong flow area,velocity deviation is relatively smaller.There is an optimal insertion angle and an optimal insertion depth interval to make the velocity deviation at different flows is small.Axial distance has a great influence on velocity deviation,and the difference between maximum and minimum velocity deviation is 42.51%.The intensity of turbulence increases with the increase of the axial distance.Blindly increasing the fillet radius seems to increase the velocity deviation.The best fillet radius exists so that the velocity deviation is minimum at different flows rates.

关 键 词：进气系统 空气流量计 数值模拟 速度偏差 湍流强度 

分 类 号：U463.6[机械工程—车辆工程]