Prediction of Flow Development on Spillways
Prediction of Flow Development on Spillways
复制标题
溢洪道流量发展预测
DOI：
10.1061/jyceaj.0004414
复制
发表时间：
1975
影响因子：
2.4
通讯作者：
A. Rastogi
中科院分区：
文献类型：
--
作者：
R. Keller;A. Rastogi
本文提出了一个溢洪道掺气区上游水流发展的数学模型。该模型是基于数值解的时间平均二维形式的Navier-Stokes方程。从模型的平均速度分布，边界层的增长，和水面轮廓的预测与实验数据进行比较，模型和原型。获得了极好的一致性。此外，它是决定性的，在溢洪道流中的自掺气开始在床引起的湍流到达自由表面的点。
A mathematical model for the flow development upstream of the region of air entrainment on a spillway is presented. The model is based on numerical solutions of the time-averaged two-dimensional form of the Navier-Stokes equations. Predictions from the model of mean velocity distributions, boundary layer growth, and water surface profiles are compared with experimental data, both model and prototype. Excellent agreement is obtained. Furthermore, it is shown conclusively that self-aeration in a spillway flow commences at the point where the bed induced turbulence reaches the free surface.