考虑重力及离心力的溢流坝反弧段紊流边界层动量积分方程的数值计算

Numerical simulation of momentum integral equation of turbulent boundary on spillway bucket considering the gravity and centrifugal force

论文分析了溢流坝反弧段水流的运动特征及影响边界层发展的主要因素,认为溢流坝反弧段水流边界层与绕流边界层是不同的。对于有自由水面存在的反弧段水流,在边界层外水流是有势流动的假设条件下,考虑重力及离心力的作用,提出了反弧段紊流边界层的动量积分方程式,计算结果与实验值比较表明文中的计算模式是正确的,可用于分析计算溢流坝反弧段边界层的发展厚度。

This paper analyzes the flow movement behaviors on spillway bucket and the primary factors affecting the development of the boundary layer. It is considered that the boundary layer is different from the boundary layer in flow around a flat. Under the assumption that the flow beyond the boundary layer is potential, this paper proposes the momentum integral equation of turbulent boundary layer taking into account the gravity, centrifugal force and effects of the flow surface. The comparisons between the computational results and experimental data show that the method presented in this paper can provide good accuracy, and the equation can be used to calculate the development thickness of boundary layer on spillway bucket.