跌扩型底流消能涡体运动数值模拟研究  

Numerical simulation study on vortex motion for dip-expansion type energy dissipation by hydraulic jump

作　　者：戴荣强 DAI Rong-qiang

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《东北水利水电》2022年第3期39-42,72,共5页Water Resources & Hydropower of Northeast China

摘　　要：文中基于跌扩型消力池两侧立轴漩涡发展情况较为复杂的问题,采用RNGK-ε紊流数学模型,对不同突扩比、进口流速时立轴漩涡的运动轨迹进行模拟。分析了不同进流条件对立轴漩涡中心点位置的影响,以及不同突扩比对消能率和流速衰减率的影响情况,建立了相应的关系曲线。结果表明,立轴漩涡可提高消力池的消能效果;随着突扩比的增加,立轴漩涡中心点在平面两个方向上均逐渐偏离消力池进口,进口流速的增加仅引起水流方向上的偏离。In this paper, based on the complicated development of vertical vortex on both sides of dip-expansion type stilling basin,the RNG-turbulence mathematical model is used to simulate the movement trajectory of vertical vortex with different expansion ratio and inlet velocity. The influence of different inlet conditions on the position of vertical axis vortex center and the influence of different burst expansion ratio on energy dissipation rate and velocity attenuation rate were analyzed, and the corresponding relationship curves were established. The results show that the vertical axis vortex can improve the energy dissipation effect of the damping tank.With the increase of sudden expansion ratio, the center point of vertical axis vortex gradually deviates from the inlet of the basin in both directions of the plane, and the increase of the inlet velocity only causes the deviation of the flow direction.

关 键 词：底流消能 跌扩型消力池 立轴漩涡 RNGK-ε紊流模型 

分 类 号：TV135.21[水利工程—水力学及河流动力学]