高拱坝挑流水舌在水垫中的扩散流速和动水压强  

Velocity and hydrodynamic pressure distributions produced by high arch dam water jets in a water cushion pool

作　　者：孙建[1] 李玉柱[1] 余常昭[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2002年第S1期84-87,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九五"科技攻关项目 (96-2 2 1-0 5 -0 1-0 2 )

摘　　要：为研究高拱坝下游水垫塘底板的稳定性 ,应用二元紊动射流理论 ,论证了水垫中最大紊流切应力和脉动压强点向上、下游偏离 ,并给出了计算偏离的公式 ;利用安芸周一、二滩和小湾水垫塘试验资料 ,建立了适用于浅、深水垫的二元水舌扩散流速公式、脉动压强均方根和紊流切应力的关系 ;利用三元紊动射流试验资料 ,引入水舌宽厚比 。The theory for turbulent two dimensional submerged jets and experimental results for the wall pressure fluctuations in a water cushion pool were used to relate the pressure fluctuations and the turbulent stresses in a diffusing jet. The location of the maximum turbulent stress was found not to be in the middle of the water jet, but some distance from the center. The analysis was also used to relate the velocity to the width and thickness of the water jet. The results can be used for water cushion pool desi...

关 键 词：高拱坝 挑流水舌 水垫塘 扩散流速 脉动压强 紊流切应力 

分 类 号：TV653[水利工程—水利水电工程]