龙滩水电站尾水调压室形式选择  

Type selection of tailrace surge chamber of Longtan Hydropower Station

作　　者：罗俊军[1] 李建平[1] 

机构地区：[1]中南勘测设计研究院,湖南长沙410014

出　　处：《水力发电》2004年第6期9-12,共4页Water Power

摘　　要：调压室形式的选择及合理的结构布置关系到水电站洞室群的稳定、运行及投资等。为此,对龙滩水电站采用简单式和阻抗式两种尾水调压室方案进行了对比分析,结果表明:在现安装高程下,阻抗式调压室能较好地满足尾水管真空度、最低涌浪等要求,且调压室高度可比简单式略低,不需考虑下室设置等问题,结构形式较简单,布置难度不大;同时可避开断面突然扩大的问题,使得室内流态较好,有效地减小了室内的水头损失。因此,龙滩工程选用阻抗式调压室是合适的。The type selection and the reasonable structural arrangement of tailrace surge basin are referred to the investment,the operation and the stabilization of hydroelectric station′s grottoes. Therefore,two comparative alternations of the tailrace surge basin,the simple surge chamber and the impedent surge chamber,are used to Longtan hydroelectric station,and the results indicated:at the condition of existing elevation of erection,the impedent surge chamber can meet preferably the demands of draftpipe′s degree of vacuum,extreme downsurge and so on. In addition,the impedent surge chamber′s height is lower than the simple surge tank's height,some problems ,such as the instalation of lower surge chamber, have no use for being considered too. And the structural form is simple and the arrangement is easy, simultaneity the problem of cross-section sudden expansion is avoided. This makes the flow condition in the tailrace surge basin be preferably and decrease the head loss of tailrace surge basin effectively. So the impedent surge chamber is fit to be used in Longtan hydroelectric station.

关 键 词：调压室 水力过渡过程 尾水系统 龙滩水电站 

分 类 号：TV732.5[水利工程—水利水电工程]