变顶高尾水洞的顶坡及体形设计方法  

Method on Upper Ceiling and Configuration Design of Tailrace Tunnel with Inclined Ceiling

作　　者：张永良[1] 缪明非[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水力发电》2010年第11期27-29,共3页Water Power

基　　金：国家自然科学基金项目(50539070);清华大学自主科研计划项目(2009THZ07060);973项目(2006CB403304)

摘　　要：基于机组甩负荷工况下变顶高尾水系统尾水管进口处真空度的计算公式,推导出保证尾水管进口满足真空度要求的顶坡计算分析公式。在机组甩负荷后明渠最大负涌浪以及安全顶坡分析公式的基础上,提出了变顶高尾水洞体形设计的程序性定量化方法,从而可对变顶高尾水洞的体形进行定量化的分析设计。由顶坡坡度分析公式所获得的计算结果与物理模型实验结果进行了比较,表明该公式是合理的。这些结果和方法可以方便地应用于工程初步设计。The formula for the upper ceiling slope analysis of a tailrace tunnel with inclined ceiling was deduced from the formula for vacuum degree calculation in the draft-tube inlet of such tailrace tunnel under the condition of turbine load rejection.A procedural and quantitative method for the configuration design of tailrace tunnel with inclined ceiling was presented on the basis of upper ceiling slope analysis formula and maximum negative surge of open channel under the condition of turbine load rejection.The comparison between the results obtained from the upper ceiling slope analysis formula and model experiments show that the formula is reasonable.The results and methods can be easily applied to the preliminary design of tailrace tunnel with inclined ceiling.

关 键 词：变顶高尾水洞 体形设计 设计方法 Configuration Design 计算公式 坡度分析 变顶高尾水系统 真空度 尾水管 实验结果 定量化方法 甩负荷工况 物理模型 进口 计算结果 计算分析 机组 分析设计 初步设计 负荷后 

分 类 号：TV73[水利工程—水利水电工程] TM612[电气工程—电力系统及自动化]