明渠岸边横向取水口的三维数值计算  

3-D numerical modeling of lateral intake flow in open channel

作　　者：曹继文[1] 陈惠泉[1] 贺益英[1] 

机构地区：[1]中国水利水电科学研究院水力学研究所,北京100044

出　　处：《水利学报》2004年第2期119-125,共7页Journal of Hydraulic Engineering

摘　　要：本文是在明渠岸边横向取水口的试验研究基础上的配套数值模拟。采用雷诺平均的N—S方程,以各向异性的雷诺应力模型(RSM)封闭方程组,用SIMPLEC算法对压力—速度场求解。计算结果与试验实测结果吻合较好,反映了此项模拟的可信性,可籍以扩大、分析一些运动规律。数值计算结果启示了横向取水口水流的复杂三维流动特性,据之对取水口附近水流各区的划分、水流的分离和反向流动、螺旋流以及床面剪应力的分布等复杂水力和泥沙输移物理现象有了进一步认识。The velocity distribution,Reynolds stress and turbulent kinetic energy distribution of the flow in the lateral intake of rectangular open channel are numerically simulated.The Navier-Stokes equations for describing the flow are closed with anisotropic Reynolds stress model.The validity of the model is verified by relevant experimental data.By using this model,more hydraulic behaviors of the lateral intake flow are revealed including the demarcation of flow field,flow separation,reversed flow,formation of vortex and helical flow as well as the distribution of shear stress on the channel bed.

关 键 词：明渠 横向取水口 数值模拟 

分 类 号：TV671[水利工程—水利水电工程]