高水头闸室平板闸门小开度流量系数试验研究  

Experimental Research of Discharge Coefficient of the Plat Gate in Small Opening at High Water Head

作　　者：冯国一[1] 唐涛[1] 张锐[1] 

机构地区：[1]南水北调中线干线工程建设管理局,北京100053

出　　处：《南水北调与水利科技》2009年第2期85-87,95,共4页South-to-North Water Transfers and Water Science & Technology

摘　　要：高水头闸室闸门小开度情况下,根据闸前的水流流态可分为闸前有长有压段、短有压段两类,根据闸后水流流态可分为自由出流和淹没出流两类。平板闸门的流量系数公式形式应随着闸前闸后的水流条件的不同而不同,对于不同的类别应采取相应的流量系数公式进行计算。通过试验推导出高水头闸室平板闸门小开度闸前为长有压段闸后为自由出流的闸孔处流量系数,为工程设计和运行提供了试验依据。According to the flow condition in front of the gate, we define two different types, the long confined intake, the shot confined intake, and according to the flow condition behind the gate, we define two types： the free discharging and the submerged discharging. If the flow condition is different, the discharge coefficient will be different too. Distinguishing the flow condition in the gate shaft is good for people to know and adopt the discharge coefficient of the plat gate. According to the analysis of the test data, a discharge coefficient formula about the long confined intake of free discharge plat gate is deduced.

关 键 词：高水头 平板闸门 小开度 流量系数 

分 类 号：TV135[水利工程—水力学及河流动力学]