清渡河水库溢洪道模型试验研究与体型优化  

Model Experiment and Shape Optimization of Qingduhe Reservoir Spillway

作　　者：武英豪 王均星[1] 包芬芬 邓宇轩 WU Ying-hao;WANG Jun-xing;BAO Fen-fen;DENG Yu-xuan(School of Water Resources and Hydropower,Wuhan University,Wuhan 430000 China;Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450000 China)

机构地区：[1]武汉大学水利水电学院,湖北武汉430000 [2]黄河勘测规划设计研究院有限公司,河南郑州450000

出　　处：《水电能源科学》2022年第8期131-135,共5页Water Resources and Power

摘　　要：清渡河水库溢洪道受下游地形条件限制,存在消力池池长严重不足的工程问题。台阶式消能工可减小入池水流弗劳德数,消力池内加设T型墩辅助消能工可缩短池内水跃长度,两者均有减小消力池所需池长的作用。初步设计采用泄槽满布台阶式消能工后接消力池的基本方案,物理模型试验表明台阶段单宽流量过大导致掺气严重不足,池长仍不足。优化方案比选采用数值模拟进行计算,即先在台阶段前加设掺气挑坎和通气孔进行强迫掺气,在提高台阶段掺气水平的同时减小入池水流弗劳德数,但池长仍不足;之后在消力池内布置T型墩辅助消能工,采用联合消能方案。对推荐体型进行物理模型试验复核,结果表明台阶消能工+消力池内加设T型墩辅助消能工的联合消能方案,可有效解决消力池池长不足的工程问题。The spillway of Qingduhe Reservoir is restricted by the topography of the downstream,which leads to the engineering problem of insufficient length of the stilling pool.The stepped energy dissipator can reduce the Froude number of the water flowing into the pool,and the addition of T-shaped pier auxiliary energy dissipator can shorten the length of the water jump in the basin,both of which can reduce the required length of the stilling pool.The preliminary design adopts the basic scheme of the stepped energy dissipator followed by the stilling pool.The physical model test shows that the single-width flow at the platform stage is too large,which leads to serious insufficient aeration and insufficient pool length.The comparison and selection of optimization schemes were calculated by numerical simulation.Firstly,adding a bucket aerator and vent holes before the platform stage to perform forced aeration and increasing the level of aeration in the platform stage,it reduced the Froude number of the water flowing into the pool,but the pool length was still insufficient.Then,a joint energy dissipation scheme was adopted,and T-shaped pier auxiliary energy dissipators were arranged in the stilling pool.The physical model test of the recommended body shape shows that the combined energy dissipation scheme of step energy dissipator combined with the addition of T-shaped pier auxiliary energy dissipator in the stilling pool can effectively solve the engineering problem of insufficient length of the stilling pool.

关 键 词：消力池 台阶式消能工 掺气挑坎 强迫掺气 T型墩 

分 类 号：TV135.2[水利工程—水力学及河流动力学]