Velocity and pressure distributions in discharge tunnel of rotary-obstruction composite inner energy dissipation  

作　　者：CAO ShuangLi 1,NIU ZhengMing 1,YANG Jian 2 & LU HongBo 1 1 Xi’an University of Technology,Xi’an 710048,China 2 China Water Resources Pearl River Planning,Surveying & Designing Co.Ltd,Guangzhou 510610,China 

出　　处：《Science China(Technological Sciences)》2011年第S1期111-117,共7页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China-Ya Long United Fund(Grant No.50579086);the the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.200807000007)

摘　　要：On the basis of model test and theoretical analysis of velocity and pressure distributions,an hypothesis is presented that the distribution of tangential velocity in radial direction seems to be a combinational distribution of a quasi-free vortex and a quasi-forced vortex for the discharge tunnel of rotary-obstruction composite inner energy dissipation.The variations of corresponding parameters about the hypothesis are obtained under test conditions in this paper.The formula of pressure distribution in radial direction is deduced theoretically,and the theoretical values of pressure distribution computed by the formula are well consistent with the measured ones,showing that the formula is correct and can be applied to the computation and analysis of pressure distribution of this discharge tunnel.On the basis of model test and theoretical analysis of velocity and pressure distributions,an hypothesis is presented that the distribution of tangential velocity in radial direction seems to be a combinational distribution of a quasi-free vortex and a quasi-forced vortex for the discharge tunnel of rotary-obstruction composite inner energy dissipation.The variations of corresponding parameters about the hypothesis are obtained under test conditions in this paper.The formula of pressure distribution in radial direction is deduced theoretically,and the theoretical values of pressure distribution computed by the formula are well consistent with the measured ones,showing that the formula is correct and can be applied to the computation and analysis of pressure distribution of this discharge tunnel.

关 键 词：discharge tunnel rotary-obstruction COMPOSITE INNER energy dissipater model test ASSUMPTION of velocity DISTRIBUTION the formula of pressure DISTRIBUTION 

分 类 号：TB33[一般工业技术—材料科学与工程]