溢流堰特性对差动式调压室水力特性影响研究  

Study on the influence of overflow weir characteristics on hydraulic characteristics of differential surge tank

作　　者：安华 AN Hua

机构地区：[1]上海勘测设计研究院有限公司,上海200050

出　　处：《东北水利水电》2020年第3期45-47,I0002,共4页Water Resources & Hydropower of Northeast China

摘　　要：水电站调压室和闸门井之间的隔墙设置溢流堰,形成差动式调压室。溢流堰的特性如高程、溢流宽度、溢流系数的取值直接关系到差动式调压室的水力特性。为此该文采用特征线法模拟差动式调压室的涌浪水位波动过程,并对溢流堰特性进行敏感性分析。由此,探讨溢流堰特性对差动式调压室水力特性的影响。结果表明:溢流堰高程对差动式调压室水力特性的影响最大,其次是溢流堰宽度,最后是溢流堰溢流系数;建议溢流堰的高程定在调压室稳定水位附近,溢流堰的宽度尽可能取大值,溢流堰尽可能采用溢流系数大的堰型。Overflow weir is installed on the partition wall between the surge tank and the gate well of hydropower station to form differential surge tank.The elevation,overflow width and overflow coefficient of overflow weir are directly related to the hydraulic characteristics of differential surge tank.In this paper,the characteristic line method is used to simulate the process of surge water level fluctuation in differential surge tank,and the sensitivity of overflow weir is analyzed to explore the influence of overflow weir characteristics on the hydraulic characteristics of differential surge tank.The results show that the height of overflow weir has the greatest influence on the hydraulic characteristics of differential surge tank,followed by the width of overflow weir,and finally the overflow coefficient of overflow weir.It is suggested that the overflow weir is set near the stable water level of the surge tank.The width and overflow coefficient of the weir is as large as possible.

关 键 词：差动式调压室 水力特性 溢流堰高程 溢流堰宽度 溢流系数 

分 类 号：TV74[水利工程—水利水电工程]