采用任意拉格朗日 欧拉 (ALE)法 ,对多缸柴油机进气管管内流动进行三维稳态可压缩湍流数值模拟 .计算物理模型针对实际进气管形状 ,湍流模型采用k ε双方程模型 ,进出口边界采用给定压力边界条件 .以某一非增压 6缸柴油机进气管为例 ,对 6分支歧管出口同时打开的情况获得了速度场 ,揭示了进气管管内流动特性 ,为进一步进行各缸进气不均匀性分析奠定了基础 . The steady-state compressible turbulent numerical simulation of multi-cylinder diesel engine intake manifold was carried out by using arbitrary Lagrange Euler (ALE) method.For the actual intake manifold shape, the turbulence model was modeled by k ε equation A given pressure boundary condition is adopted for the outlet boundary.With the inlet pipe of a non-supercharged 6-cylinder diesel engine as an example, the velocity field is obtained when the outlet of the 6-branch manifold is opened at the same time, and the flow characteristics in the inlet pipe are revealed. Inhomogeneous cylinder inlet analysis laid the foundation.