大坡度台阶式溢洪道中的水翅现象  

Water-wing on steep slope of stepped spillways

作　　者：韩玙[1] 冯瑞林[1] 田嘉宁[1] 李布雳[1] 

机构地区：[1]西安理工大学水电学院,西安710048

出　　处：《水力发电学报》2006年第1期114-118,共5页Journal of Hydroelectric Engineering

基　　金：陕西省自然科学基金(E218);陕西省教育厅专项基金(01JK183)

摘　　要：水翅是大坡度台阶式溢洪道在流量较小时出现的一种水流现象。模型试验表明：当斜坡角度为40°～60°时，水翅几乎存在于整个跌落水流范围内，甚至持续到过渡水流。随着溢洪道底坡的增大，水翅流量变化范围变小、高度增加；但是随着台阶尺寸的减小，流量变化范围缩小、高度降低；水翅的落点处．台阶面上压强明显增大。The Experimental stu 60 degrees, discharge ran water-wing always appears when discharge is smaller on steep slope of stepped spillways. dies of model show that when the base slope of spillways changes within the range of 40 degrees to water-wing nearly exists in the whole nappe flow, even continues to the transition flow. The of the water-wing decreases and the height of the water-wing increases with augmentation of the bottom slope of stepped spillways; but the discharge range and height of the water-wing decrease with decrease of step size; the intensity pressure on the steps increases remarkably at the failing point of the water-wing.

关 键 词：水力学 大坡度台阶式溢洪道 水翅 模型试验 跌落水流 过渡水流 

分 类 号：TV135.2[水利工程—水力学及河流动力学]