V形阶梯溢洪道水力学特性试验研究  

Experimental Research on Hydraulic Characteristics of V-type Stepped Spillway

作　　者：余飞[1] 张建民[1] 聂境[1] 石旭芳[1] 汪旭[1] 张永强 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]河北省水利水电第二勘测设计研究院,河北石家庄050000

出　　处：《水电能源科学》2012年第5期69-72,共4页Water Resources and Power

摘　　要：针对V形阶梯溢洪道在大单宽流量下运行存在的问题,研究了坡比为1∶2的V形阶梯溢洪道在不同单宽流量时的流态、时均压强、消能率等水力学特性。试验结果表明,同一阶梯的不同位置,漩涡的强度不同,越靠近中轴线漩涡强度越小;阶梯水平面上的负压区集中于靠近边墙的凹角处,中轴线附近无负压;阶梯竖直面上,凹角处时均压强最大;消能率较高,且适应范围更大。In accordance with the problems of V-type stepped spillway running under circumstance of large discharge per unit width,hydraulic characteristics of V-type stepped spillway with slope of 1∶2,such as flow pattern,time average pressure and energy dissipation ratio,are studied under different discharge per unit width.The test results show that the vortex strength is different with its location on the same step;the more close to the central axis,the smaller the vortex strength is;on the horizontal plane of certain step,most of the negative pressure zones are located near the concave corner of the side walls while none near the central axis;on the vertical plane,the largest time average pressure is located near the concave corner;the energy dissipation ratio is higher and application scope of V-type stepped spillway is wide.

关 键 词：V形阶梯溢洪道 流态 时均压强 消能 试验研究 漩涡 

分 类 号：TV131[水利工程—水力学及河流动力学] TV651.1