基于低弗氏数水流下折坡渐扩式消力池的优化

Optimization of the Slope Expanding Stilling Basin Under Low Froude Flow Condition

底流消能中在遇坡度情况下通常采用折坡扩散型消力池,其消能效果较好,对地形适应性强,在同等水利条件下,需要的池深更小,更经济高效。折坡式消力池的优化及应用还存在难题,该体型在低弗氏数水流下的消能与具体工程的应用具有一定研究价值。本工程水流为低弗劳德数水流,通过模型试验,在不同工况下,对折坡扩散式消力池的水深、压强、消能率等水力特性做了研究,针对三种不同体型比较优化,最终得出加深消力池与在护坦加设消能墩的方式,其对下游水深的适应更好。

Bottom flow energy dissipation usually adopt folding diffusion model stilling basin when it come across slope,the energy dissipation effect of which is good and it also has the advantage of strong terrain adaptability,under the same water conservancy condition,the deep pool is smaller comparing to other energy dissipation,thus it is very efficient in terms of economy. However the optimization and application of slope stilling basin is still a remaining issue,the body design in the low Froude flow condition and specific engineering application is of great importance. In this paper,the project of low froude number flow was tested under different conditions,folded slope dispersive stilling basin water depth,pressure and energy dissipation of hydraulic characteristics were optimizaed based on three different sizes,and measures such as deepen stilling basin and adding apron energy dissipation piers in the manner were proposed which is better to the downstream water depth.