针对管道内横向凹槽减阻问题,采用标准κ-ε模型,通过数值仿真,计算比较了在10组管道内不同流速情况下的阻力,分析了速度和凹槽形状对减阻的影响。得到凹槽减阻机理:凹槽内的低速流体相当于一层水膜,可使高速流体不直接与管内壁接触,从而减小摩擦阻力;同时凹槽内漩涡区越规则,局部阻力越小。 Aiming at the problem of drag reduction in the transverse groove in the pipeline, the standard κ-ε model was adopted to calculate and compare the resistance under different flow velocities in 10 groups of pipes by numerical simulation. The influence of velocity and groove shape on drag reduction was analyzed. Get groove drag mechanism: low-speed fluid in the groove is equivalent to a layer of water film, the high-speed fluid does not directly contact with the pipe wall, thereby reducing the frictional resistance; .