高拱坝双层孔泄流不同阶段水流运动特性分析  

Analysis of flow movement characteristics in different stages of discharge through dual-layer outlets of high arch dam

作　　者：张海生[1] 高海静[1] 马细霞[2] ZHANG Haisheng;GAO Haijing;MA Xixia(Henan Water Conservancy and Hydropower School, Zhoukou 466001, Henan, China;Zhengzhou University, Zhengzhou 450001, Henan, China)

机构地区：[1]河南省水利水电学校,河南周口466001 [2]郑州大学,河南郑州450001

出　　处：《水利水电技术》2020年第9期84-89,共6页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金项目(51679261)。

摘　　要：通过构造高拱坝双层孔泄流物理模型,以k-ε双方程紊流模型作为物理模型的水流控制方程,确定运算区域,通过分块结构化网格进行区域网格划分,设置边界条件,运用物理模型检测出射水流的空中抛射运动轨迹,基于抛射体理论结合控制方程分析出射水流在双层孔泄流孔阶段、空中抛射阶段和下游水垫阶段入射角及入射流速等特性。将物理模型与理论计算方法相结合,可全面分析水流运动特性,且分析结果同实测值间误差较小,基本控制在3%以下,说明该方法分析高拱坝双层孔泄流下不同阶段水流运动特性是可行的。Through establishing a physical model for the discharge through dual-layer outlets of high arch dam,the k-εtwo equation turbulence model is taken as the flow control equation for the physical model to determine the computational domain,and then the jetting trajectory in the air of the jet-flow is detected with the physical model by means of setting the relevant boundary conditions through dividing the regional grid with the block structured grids,while the characteristics of the jetting out angles and jetting out velocities of the jet-flow during the stages of discharging through the dual-layer outlets,jetting out in the air,jetting out into the downstream water cushion,etc.are analyzed in accordance with the theory of projectile combined with the control equation.Combining the physical model with the theoretical calculation method,the flow movement characteristics can be comprehensively analyzed,from which the errors between the analysis results and the measured values are less and generally controlled below 3%;which indicates that this method is feasible to analyze the flow movement characteristics during the different stages of the discharge through the dual-layer outlets of high arch dam.

关 键 词：高拱坝 双层孔泄流 水流运动特性 

分 类 号：TV131.4[水利工程—水力学及河流动力学]