新型宽尾墩和阶梯式溢流坝面一体化消能工数值模拟

Numerical simulation of energy dissipator with new style flaring gate pier and stepped spillway

将宽尾墩、阶梯溢流坝和消力池联合起来形成一体化的水工消能设施,充分利用了宽尾墩和阶梯溢流坝的优点,单宽流量比纯阶梯溢流坝可增大数倍.采用k-ε双方程紊流模型对这种一体化消能工进行了三维数值模拟,描述了在索风营水电站应用的X型宽尾墩,给出了模拟得到的大曲率水气交界面、宽尾墩墩体压力、消力池压力及流速分布,并与模型实验结果进行了对比,吻合良好.研究结果表明,X型宽尾墩、阶梯式溢流坝面和消力池一体化设施的消能作用是良好的.

The flaring gate piers （FGP） are combines with the stepped spillway and stilling pool. They form the united dissipation system, which possesses advantages of both FGP and stepped spillway. The flow discharge per unit width is increased several times than the single stepped spillway. In this paper, the standard k-ε model was used to simulate the flows of this system and the X-shape FGP, which has been applied in Suofengying hydro plant, was described. The calculated results of hydropneumatic interfaces, pressure characteristics and velocity distribution were compared with the experimental data, and they were in good agreement with each other. The study results showed that this type dissipator is effective for the problem of energy dissipation.