底流消能工附壁射流区水流特征流速研究  

Study on velocity characteristics of wall jet flow of Underflow energy dissipation

作　　者：欧阳晨 OUYANG Chen(School of Electric Power Engineering of Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学电力工程学院,昆明650500

出　　处：《南水北调与水利科技》2018年第S01期77-79,共3页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金(51669007)。

摘　　要：通过水工模型试验,在不同尾坎深度d、入池流量Q下对附壁射流区横向、竖向水流流速发展和分布规律进行分析和研究,得出结论:(1)附壁射流区临底流速横向分布曲线曲率的纵向变化是一个反复增减的过程,当流程无限延长时,曲率趋于0;测点1到测点3的曲率递增。尾坎深度d=12 cm的曲率沿纵向先增后减再增再减,尾坎深度d=14 cm的曲率波动较大。(2)尾坎深度d=12 cm时,工况Q=9.38、11.39 L/s的附壁射流区竖向水流流速分布曲线曲率沿纵向递增,当流程无限延长时,曲率趋于0;入池流量Q越大,竖向流速分布曲线曲率越大,当入池流量Q无限增大时,曲率趋于0。3、附壁射流区除临底水流流速由A到B递减,由B到纵轴线流速有增有减外,其余竖向测点的流速沿横向先增后减再增再减。Through the hydraulic model test,the development and distribution of lateral and vertical flow velocity in the wall jetarea are analyzed and studied at different depths of the tailstock and the flow rate of the inlet.The following conclusions are drawn:1,The longitudinal variation of the curvature of the lateral flow distribution near the bottom wall is a process of repeated increase and decrease.When the flow is infinitely lengthening,the curvature tends to 0,and the measured point 1 increases to the 3 of the measured point.The curvature of the tail depth of d=12 cm increases and then decreases and then decreases along the longitudinal direction,and the curvature of the tail depth of d=14 cm is greatly fluctuated.2,End sill depth of d=12 cm,Q=9138,11139 L/s mode vertical wall jet flow velocity distribution curve along the longitudinal curvature increases,when the infi-nite extension process,curvature tends to 0;the greater the Q flow into the pool,the vertical velocity distribution curve of curvature increases,when the flow of Q into the pool increases indefinitely,curvature tends to 013,the velocity of the adjacent wall jet decreases from A to B,and the flow velocity increases from B to longitudinal axis.The velocity of the other vertical points in-creases first and then decreases along with the lateral direction.

关 键 词：底流消能工 附壁射流区 流速特征 曲率 

分 类 号：TV131[水利工程—水力学及河流动力学]