嘉峪关水文站堰闸推流探讨  

Weir Gate Plug Flow Analysis at Jiayuguan Hydrologic Station

作　　者：张文春 蒋憬 吴锦奎[2] 

机构地区：[1]甘肃省酒泉水文水资源勘测局,甘肃嘉峪关735100 [2]中国科学院寒区旱区环境与工程研究所流域水文及应用生态实验室,甘肃兰州730000

出　　处：《水力发电》2015年第11期29-33,共5页Water Power

基　　金：国家重大科学研究计划项目(2013CBA01806);国家科技支撑计划(2013BA05B03)

摘　　要：针对讨赖河嘉峪关水文站堰闸推流方法做了详细的分析论证。根据实测资料,绘制出堰闸前水头h_u—流量系数C_1、溢洪坝上游水头h_u—流量系数C_1及闸门开启高度与闸前水头之比e/h_u—孔流流量系数M等关系曲线图,找出堰闸出流规律,确定出流流量计算公式,推求自由式堰流和孔流流量系数及溢洪坝流量系数,并率定得出经验公式。在Excel电子表格中编制出孔流流量计算模块,完成推流计算,解决了复杂的测验和整编过程。The approaches for analyzing weir gate plug flow at Jiayuguang Hydrologic Station on Taolai River are analyzed and argumented. Based on actual measurement data, the dependence graphs for water head hu-flow coefficient C1 in front of gate, water head hu-flow coefficient C1 in the upstream of overflow dam, as well as the ratio between the height of gate opening and water head in front of the gate e/hu-hole flow coefficient M are protracted. The law of outflow at the gates is found out, the computation formula for outflow is determined, and the values of freestyle weir flow coefficient, overflow dam flow coefficient and freestyle hole flow coefficient are derived. The empirical formula is finally calibrated. The flow calculation module is compiled in an Excel spreadsheet to complete the calculation of plug flow. The complicated testing and reorganization of measurement data for the Station is solved.

关 键 词：自由式堰流 孔流 溢洪坝 流量系数 推流 嘉峪关水文站 

分 类 号：TV132[水利工程—水力学及河流动力学]