厄瓜多尔CCS水电站首部枢纽冲沙闸水力特性研究  

Research on the Hydraulic Characteristics of the Flushing Gates of the Intake Complex in Ecuador CCS Hydropower Stations

作　　者：张国来 吴国英[2] 武彩萍[2] 宋莉萱[2] 

机构地区：[1]中水电海外投资有限公司,北京100048 [2]黄河水利科学研究院,郑州450003

出　　处：《中国农村水利水电》2013年第12期154-157,共4页China Rural Water and Hydropower

基　　金：水利部公益性行业科研专项经费项目资助(200901017)

摘　　要：通过模型试验对电站首部枢纽冲沙闸的水力特性:如过流能力、压力、上下游流态、流速分布及消能防冲效果进行了量测分析,研究表明,冲沙闸的泄流能力满足设计要求。原设计方案闸前进口流态受闸前导墙影响,产生绕流,并在闸前产生跌水,闸前流态紊乱,闸前各断面流速分布不均。闸下泄水经过消力池消能后仍有较大的余能,出池护坦水流流速达到11m/s,对下游均会产生严重的冲刷。结合模型试验对冲沙闸局部体型以及消力池体型及下游防护形式进行了修改,上下游流态及下游消能得到改善,海漫下游防冲槽整体基本保持稳定。This paper analyzes the discharge capacity, pressure, up-and-down flow pattern, flow velocity distribution and energy-dissipation and erosion prevention effect of the flushing gates of the intake complex in the hydropower station by model testing. The results show that the discharge capacity of the flushing gates meet the requirements of design. The flow pattern of the intake in front of the flushing gates in the original design solution is affected by the guide wall in front of the gates, resulting in the flow around, drop water, disorderly flow pattern in front of the flushing gates and uneven distribution of flow velocity of each cross section in front of the flushing gates. After energy dissipation in the stilling basin, water discharge under the flushing gates still has a large surplus energy and the apron water flow velocity out of the stilling basin reaches llm/s, which will produce the serious flushing on the downstream. This paper modifies the local body of the flushing gates, the shape of the stilling basin as well as the protective type in the downstream based on the model testing. The up and down flow pattern and the energy dissipation in the downstream are improved. The anti-scour channel of the apron downstream remains stable on the whole.

关 键 词：厄瓜多尔 冲沙闸 水力特性 消能冲刷 

分 类 号：TV698.16[水利工程—水利水电工程]