某型进气歧管CFD计算仿真

摘要

By using Star-CD software, the paper carried out 3D numerical simulation to one intake manifold. First, it analyzes the general performance by using pressure difference got from CFD stability calculation; then, it analyzes the different evenness between naturally aspirated engine and supercharged engine using this kind of manifold through instantaneous analysis. The results of numerical calculation show that the circulation of the intake manifold is nice; the intake manifold installed on nature engine is better.%利用Star—CD软件对公司某型发动机进气歧管进行三维数值仿真模拟。首先通过CFD稳态计算得到进出口的压力梯度对进气歧管的流通性能进行分析；其次通过瞬态计算分析该进气歧管应用在自然进气发动机与增压发动机时的进气均匀性差别。结果表明：该歧管的流通性能良好；在进气均匀性方面应用在自然进气发动机比应用在增压发动机上效果优良。