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针对黄金坪泄洪洞消力池受地形地质条件的限制,消力池长度明显不足、水跃跃首流态较差、消能效果不理想的问题,通过水力学模型试验,调整优化了泄洪洞出口跌坎高度、挑角及坡度体型,并观测了消力池水流流态、水面线、临底流速、底板压强、出口流态和流速等水力特性指标。结果表明,与原设计方案相比,调整体型后的消力池流态得到了很好地控制、消能效果增强,消力池出池水面跌落和流速均有所减小,各项水力学参数指标满足设计要求,通过体型优化实现了在原有消力池长度条件下改善流态和增强消能的目的。
According to the restriction of the topography and geology conditions, the length of the stilling pool is obviously insufficient, the first flow state of the water jump jump is poor and the energy dissipation effect is not ideal. According to the hydraulic model test, the optimization of the discharge tunnel Outlet drop height, pick angle and slope body shape, and observed the hydrodynamic characteristics of the stilling pool water flow pattern, surface water line, bottom flow rate, floor pressure, outlet flow pattern and flow rate. The results show that compared with the original design scheme, the flow pattern of the stilling pool after body adjustment is well controlled, the energy dissipation effect is enhanced, and the drop and flow velocity of the stilling pool out of the pond are reduced. The hydraulics The parameter index meets the design requirements and achieves the goal of improving the flow regime and enhancing the energy dissipation under the condition of the original stilling pool length through body shape optimization.