三河口水利枢纽泄洪消能工体型优化试验研究

通过水力学模型对三河口水利枢纽泄洪消能工体型进行了试验研究。结果表明:两底孔出口采用矩形不对称宽尾墩形成的窄缝体型,三表孔采用左、右表孔差动式齿坎与中表孔舌型鼻坎组合的优化方案具有表孔、底孔出口水舌上下分层、前后拉开、横向扩散的特点,从而改善了水垫塘内的水流流态,提高了消能效率,水垫塘底板所受动水冲击压力及脉动压力达到了设计要求。

Experiment on shape optimization of energy dissipation for Sanhekou water control project

The experiment on the shape of energy dissipation for Shanhekou water control project was carried out by hydraulic model. The results show that the exits of two bottom outlet was designed into narrow slit shape of asymmetric rectangle flared gate pier, while the left and right upper outlet adopt the shapes of differential tooth bucket, and the middle upper outlet adopt tongue-typed flip bucket. The optimization scheme with surface and bottom outlet water tongue layering from top to bottom, before and after the open has the lateral diffusion characteristics, so as to improve the flow pattern of water cushion pool,and improve the efficiency of energy dissipation. The dynamic water impact pressure and fluctuating pressure which exerts on the bottom slab of water cushion pool reaches the design requirement.