某发动机进气歧管的CFD分析及优化  

CFD Analysis and Optimization of an Engine Intake Manifold

作　　者：马靖岩 吴贞明 李保儒 庄鹏兴 MA Jingyan;WU Zhenming;LI Baoru;ZHUANG Pengxing(Qingdao Huatao Automobile Mould Co.,Ltd.,Qingdao 26600,China)

机构地区：[1]青岛华涛汽车模具有限公司,山东青岛26600

出　　处：《内燃机》2023年第5期35-39,共5页Internal Combustion Engines

摘　　要：进气歧管的内气道结构直接影响发动机各缸的进气量及进气均衡性,从而影响发动机不同工况条件下的动力性能。以某型号发动机进气歧管为分析对象,应用分析软件STAR-CCM+建立有限元模型,对进气歧管的内流场进行计算,并得出各支管的质量流量、流量系数及偏差,再结合压力场分布云图和速度场分布云图,综合评价进气歧管的性能优劣,找出影响进气均衡性的结构,进而提出优化方向。运用稳流气道试验台,对优化后的进气歧管进行稳流气道试验,并将试验结果与CFD分析结果进行对比,两者误差在3%以内。与原方案相比,进气歧管平均进气质量流量提高了3.7%,各进气支管的进气流量偏差均在±3%以内,有效改善了该型号汽油机的进气均衡性,为今后进气歧管的优化设计提供了理论基础。The internal airway structure of the intake manifold directly affects the intake volume and intake balance of each cylinder in the engine,thereby affecting the power performance of the engine under different operating conditions.Taking a certain type of engine intake manifold as the analysis object,a finite element model is established using the analysis software STAR-CCM+.The internal flow field of the intake manifold is calculated,and the mass flow rate,flow coefficient,and deviation of each branch pipe are obtained.Then,combined with the pressure field distribution cloud map and velocity field distribution cloud map,the performance of the intake manifold is comprehensively evaluated,and the structure that affects intake balance is identified,and optimization directions are proposed.Using a steady flow airway test bench,conduct steady flow airway tests on the optimized intake manifold,and compare the test results with the CFD analysis results,with an error of within 3%.Compared with the original scheme,the average intake mass flow rate of the intake manifold is increased by 3.7%,and the intake flow deviation of each intake branch is within±3%,which effectively improves the intake balance of this type of gasoline engine,and provides a theoretical basis for the optimization design of the intake manifold in the future.

关 键 词：进气均衡性 CFD仿真 结构优化 稳流试验台 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]