扭切式鼻坎挑射水流作用机理分析  

Analysis on the Mechanism of Water Jet with Twist-cut Flip Bucket

作　　者：吴锦钢 邱勇 周鑫宇 葛亚飞 黄梓涵 WU Jingang;QIU Yong;ZHOU Xinyu;GE Yafei;HUANG Zihan(College of Water Resources and Hydraulic Engineering,Yunnan Agricultural University,Kunming 650201,Yunnan,China)

机构地区：[1]云南农业大学水利学院,云南昆明650201

出　　处：《水力发电》2022年第8期50-54,共5页Water Power

基　　金：云南省教育厅科学研究基金项目(2020Y0180)。

摘　　要：针对扭切式鼻坎可以在平面上使出坎水流转向,改变水股落点方向,能够适应下游河道变化的情况,分别对出坎挑射水流(立面挑射水流、平面偏折水流以及底部斜射水流),采用连续性方程、动量方程、弯道超高经验公式结合冲击波理论进行机理分析,得出了坎内轴线立面挑射水流的水深和流速沿程变化规律、边墙偏转侧平面偏折水流水面超高经验公式以及底部斜射水流在出坎处的偏折角度。The twist-cut flip bucket can deflect the direction of water nappe on the plane,and change the direction of water drop point simultaneously,so it can adapt to the changes of downstream river.Using the continuity equation,the momentum equation and the empirical formula of curve ultrahigh,and combined with shock wave theory,the mechanism of the water jets,including elevation jet water,plane deflection water flow and bottom oblique water jet,are analyzed.The water depth and velocity of the jet stream along the vertical axis of bucket,the empirical formula for the super-elevation of side plane deflection water surface and the deflection angle of the bottom oblique water jet at the exit of bucket are obtained.

关 键 词：流速矢量 水深 作用机理 扭切式鼻坎 挑流消能 

分 类 号：TV135[水利工程—水力学及河流动力学]