大岗山水电站泄洪洞全过程水力学问题研究  

Study on hydraulic problems in whole operation process of flood discharge tunnel of Dagangshan Hydropower Station

作　　者：李桂林 郭金婷 罗永钦 吴楠 LI Guilin;GUO Jinting;LUO Yongqin;WU Nan(Guodian Dadu River Hydropower Development Co.,Ltd,Chengdu 610041,China;Powerchina Kunming Engineering Co.,Ltd,Kunming 650033,China;Guodian Jinshajiang Xulong(Benzilan)Hydropower Development Co.,Ltd,Chengdu 610041,China)

机构地区：[1]国电大渡河流域水电开发有限公司,四川成都610041 [2]中国电建集团昆明勘测设计研究院有限公司,云南昆明650033 [3]国电金沙江旭龙(奔子栏)水电开发有限公司,四川成都610041

出　　处：《人民长江》2020年第8期214-219,共6页Yangtze River

摘　　要：大岗山水电站岸边泄洪洞具有水头高、流速大的特点,水力学问题突出。对泄洪洞的掺气设施、出口体型进行了系列优化试验研究,并通过对水力设计、水工模型试验、水力学原型观测成果的分析与对比,结合实际运行情况,阐述了泄洪洞全过程的关键水力学问题。研究成果表明:可根据工程实际适当减小模型试验的最小掺气浓度控制值;前期的科研设计应更重视小流量工况的泄洪灵活与安全性。相关成果支撑了泄洪洞的安全合理运行,可为类似工程的建设、运行提供可靠与宝贵的资料。The bank flood discharge tunnel of Dagangshan Hydropower Station has the characteristics of high head and high velocity of flow,and the hydraulics problem is prominent.In this paper,a series of optimization experiments were carried out on the aeration facilities and outlet shape of the flood discharge tunnel,and the key hydraulics problems in the whole operation process of the flood discharge tunnel were expounded by analyzing and comparing the hydraulic design,hydraulic model test and hydraulic prototype observation results.The results showed that the minimum aeration concentration control value of the model test could be reduced according to the engineering practice,and the early design and scientific research should pay more attention to the flexibility and safety of the small flow discharge.The relevant results can support the safe and reasonable operation of flood discharge tunnel and provide reliable and valuable information for the construction and operation of similar projects.

关 键 词：泄洪洞 全过程水力学问题 模型试验 原型观测 大岗山水电站 

分 类 号：TV135.2[水利工程—水力学及河流动力学]