锦屏二级水电站进水口引水防沙模型试验研究  

Experiment Study on Water Division and Sediment Control of Intake in Jingping Ⅱ Hydropower Station

作　　者：彭睿[1] 聂锐华[1] 张洋[2] 杨克君[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]中国水电顾问集团华东勘测设计研究院,浙江杭州310014

出　　处：《水力发电》2013年第4期90-94,共5页Water Power

基　　金：国家科技支撑计划(2012BAB05B02)

摘　　要：通过水工模型试验研究了锦屏二级水电站电站进水口在不同拦沙坎顶高程和不同运行方式下的进水流态、垂线流速分布、局部水头损失与进水口进沙情况。对比试验观测数据发现,拦沙坎顶高程对电站进水口引水防沙有一定影响,当运行水位越高、拦沙坎顶高程越低时,进水口进流流态越好、流速分布越均匀、水头损失越小;随着拦沙坎顶高程的增加,各级流量下电站进水口进沙量明显减少且级配也明显降低。Based on physical model experiments, the properties of water intake in Jinping II Hydropower Station under different top elevations of sand trap and various operation plans are studied, which include flow regime, vertical velocity distribution, local head loss and sand condition of water intake. The data analysis shows that the top elevation of sand trap has influence on water diversion and sediment control of intake. When the water level is higher and the top elevation of sand trap is lower, the flow regime of intake is better, the velocity distribution becomes more homogeneous and the head loss is less. With the increase of elevation of sand trap top, the sand flow decreases and the gradation of sand becomes finer.

关 键 词：防沙模型 引水防沙 试验研究 拦沙坎高程 锦屏二级水电站 

分 类 号：TV149[水利工程—水力学及河流动力学] TV671