跌坎型底流消力池水力特性二维数值模拟研究

Study on the Hydraulic Characteristics of Stilling Basin with Step-Down Floor by 2-D Numerical Simulation

采用二维数值模拟的方法,模拟了表孔溢流坝及其末端的跌坎式底流消力池的二维流场。并分别从调整跌坎高度、在跌坎前增加水平段,以及改变出流角度3个方面对跌坎体型进行修改,通过各方案对比,得出消力池临底流速变化规律。可为工程设计和科学试验工作提供参考。

The flow field of the surface spillway of an overflow dam and the stilling basin with step-down floor at the end of the spillway was simulated by 2-D numerical simulation.The shape of the step-down floor was modified from three aspects,namely changing the height of the step-down floor,adding a horizontal platform in front of the step-down floor and changing the angle of the outlet.By comparing different plans,the rules of velocity variation near the stilling basin were obtained.The study can be regarded as a reference for engineering design and scientific experiments.