陡坡溢洪道掺气坎空腔长度及掺气坎角度试验  

Characteristics of Cavity Length and Deflector Angle in Spillway with Steep Slope

作　　者：崔瑞[1] 余飞[2] 张建民[2] 栗帅[2] 胡小禹[2] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]四川大学水力学及山区河流开发与保护国家重点试验室,四川成都610065

出　　处：《水电能源科学》2012年第6期108-110,共3页Water Resources and Power

基　　金：教育部科学技术研究基金资助重点项目(200810811);新世纪人才支持计划基金资助项目(NCDT-08-0378)

摘　　要：以苏家河口水电工程为例,针对其陡坡溢洪道掺气坎对流量大小适应性较差的问题进行了试验,对#2掺气坎3种体型(1∶4、1∶10、1∶15)进行了挑角的优化设计。结果表明,在陡坡溢洪道设置掺气坎时应保证挑角和坎高与单宽流量相互匹配,即挑角在3°～5°之间的空腔长度能满足各种工况,否则可能出现掺气坎适应性很差的问题,不利于工程泄洪时的正常和安全运行;空腔长度与挑角在小流量情况下呈指数关系,在大流量情况下呈对数关系,这为实际工程设计提供了依据。In view of poor adaptability between aerating bucket in steep slope spillway and discharge,the test is carried out by taking Sujiahekou hydropower project as example.And then,the shape optimization of deflector angle is designed for aerating bucket #2 with three different shapes（1：4,1：10,1：15）.The results show that the deflector angle and the bucket height should be matched with discharge per unit width when setting aerating bucket in steep slope spillway,that is,cavity length with 3°~5° deflector angle can satisfy the requirement of operation conditions;otherwise,it will probably appear poor adaptability of aerating bucket,which is not in favour of project safety operation under the condition of flood discharge.The test results also show that an exponential relationship is presented between the cavity length and deflector angle under the small discharge condition;while under the large discharge condition,it is a logarithmic variation relationship.Thus,it provides reference for practical engineering design.

关 键 词：溢洪道 体型优化 掺气挑坎 空腔长度 

分 类 号：TV131.4[水利工程—水力学及河流动力学] TV135.2