基于Realizableκ-ε紊流模型和VOF方法,以博贡大型龙抬头泄洪洞直线段为例,对挑坎后加矩型、U型和V型掺气槽的水力特性进行了三维数值模拟。结果表明,U型掺气槽水流冲击底板的压强最大,矩型和V型掺气槽对底板的冲击压强相当,矩形掺气槽形成的侧空腔最长。三种掺气槽后水流流态均平顺,水流强烈紊动形成的涡旋卷吸将空气卷吸入水流中。 Based on the Realizable κ-ε turbulence model and the VOF method, taking the straight section of the Beilong large-scale flood discharge tunnel as an example, the 3D numerical simulation of the hydraulic characteristics of the rectangular, U-shaped and V-shaped aeration tanks after the embankment is carried out. The results show that the pressure of U-shaped aerated tank impinges on the floor with the maximum pressure, and the impact pressure of the rectangular and V-shaped aerated tanks is the same as that of the bottom plate. The rectangular cavities form the longest side cavities. After the three aeration tank fluid flow is smooth, the turbulent flow of turbulent swirling suction air volume into the water.