不同开度时溢流坝弧形闸门水流三维数值模拟

Three-dimensional Numerical Simulation of Different Radial Gate Opening of Overflow Dam

以松江河梯级水电站石龙大坝溢流坝段为例,利用流体力学数值分析软件Fluent,并结合有限体积法、RNG k-ε紊流模型和流体体积分数方法,对三种库水位下不同弧形闸门开度进行了三维数值模拟,获得了各工况的泄流量,通过与理论计算值进行对比,验证了数值模拟方法的可靠性,进而对试验水位下检修闸门断面的速度场及过坝水流的水面形态进行了数值计算,可为现场试验设计提供参考依据。

Three-dimensional numerical simulations of Shilong overflow dam in Songjianghe cascade hydropower sta- tion are carried out with radial gate opening of three different reservoir level, which the finite volume method, RNG k--~ turbulent model and volume of fluid method are adopted. Compared the numerical overflow discharge with the theoretical ones, we verify the reliability of the numerical simulation. Then the velocity field and the water morphology passing the dam are calculated under the test level. Thus, it provides a reference for the field test design.