急流条件下模拟自由面紊流的“弹性盖”法

Elastic-Lid Method to Simulate Turbulence with Free Surface under the Condition of Supercritical Flow

文献［１］提出了一种模拟自由面紊流的“弹性盖”法，并实际计算了底部垂向射流流场，其自由面流动性质属缓流。本文研究了在急流条件下“弹性盖”的变形规律，得出了急流条件下只需“弹性盖”变形方向与缓流情况相反即可获得相应的自由面位置的结论，并给出了实际算例。

In ref.,the elastic-lid method,a kind of technology to simulate turblent flow with free surface,was advanced,and the flow field of vertical discharge into a shallow water was calculated as an example,where Fr<1.In this paper,the deformation of elastic-lid is studied under the condition of Fr>1.It is concluded that the position of free surface can be obtained under the condition of Fr>1 when the deformation of elastic-lid is in the opposite direction from that of Fr<1.At last,an example is provided.