跌落水流时台阶式溢洪道消力池跃前断面压力修正系数  

The Correction Factor of the Pressure of Cross Section Before A Hydraulic Jump in Stilling Basins Under Nappe Flow of Stepped Spillways

作　　者：田嘉宁[1] 李建中[1] 谭立新[1] 高桥正行 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]日本大学理工学部

出　　处：《西安理工大学学报》2005年第1期11-14,共4页Journal of Xi'an University of Technology

基　　金：陕西省自然科学基金项目(2003E218);陕西省教育厅专项科研基金项目(01JK183)。

摘　　要：台阶式溢洪道与平底消力池连接,在跌落水流流况下,比较跃前断面压力修正系λ=1和λ>1两种情况,当λ=1时消能率普遍偏大,其消能率的相对误差最大可达7%左右,随Hdam/yc增大,误差减小。当坝坡相同、坝高一定时,台阶个数与消能率无关,并不影响其误差的大小。λ值与yp/y1呈现非常好的线性相关性,其相关系数r=0.9999以上。Under the nappe flow in flat stilling basins (i=0) linked with stepped spillways,the comparison of energy dissipation ratio when λ=1 and the one when　(λ>1 )(the correction factor of the pressure of cross section before a hydraulic jump),shows that energy dissipation ratio is bigger when λ=1, and the relative error of energy dissipation ratio can reach 7% or so,meanwhile,this error decreases with an increase in H_(dam)/y_c.In the case of the slope and height of dam remaining unchanged, N(number of the steps) does not affect the energy dissipation ratio and the relative error.Accordingly, λ has a good linear correlation with y_p/y_1,with the correlation coefficient r=0.9999.

关 键 词：台阶式溢洪道 跌落水流 压力修正系数 消力池 

分 类 号：TV653[水利工程—水利水电工程]