复式断面三维漫滩水流的数值模拟  

3-D numerical simulation on overbank flows in compound channels

作　　者：张明亮[1] 沈永明[1] 吴修广[2] 郑永红[3] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116023 [2]浙江省水利河口研究院,杭州310020 [3]中国科学院广州能源研究所,广州510070

出　　处：《水力发电学报》2006年第5期31-36,共6页Journal of Hydroelectric Engineering

基　　金：国家重点基础研究发展计划(973计划)项目(2005CB724202);辽宁省自然科学基金项目(20062170)

摘　　要：本文采用非正交三维曲线坐标下的k-ε双方程湍流数学模型,对弯曲不规则地形的渠道和漫滩流动进行数值模拟。该模型在水平方向采用非正交曲线坐标,在垂直方向采用等分网格的全坐标变换,对河道底部表面和两岸壁面使用壁面函数法处理。通过弯曲渠道和顺直漫滩带有弯曲主槽的模型对本文的数学模型进行验证,给出弯道各断面的主流速分布图、各断面的二次流分布图等。对比分析,本模型的计算结果能够较好的反映实验结果,表明该模型对三维漫滩水流流动有一定的应用价值。The 3-D κ-ε turbulence hydrodynamic model in curvilinear coordinates is established to simulate the overbank flow in the curved channel with irregular terrain in this paper. Body-fitted coordinate is adopted in horizontal plane, part grid is adopted in vertical direction, wall-function method is employed to simulate the bed resistance. The model is applied to simulate the meandering channel with straight flood plain banks and the curved channel, the main velocities and the secondary velocities for all sections in longitudinal and cross-section are presented respectively. By contrasting and analyzing, the results of simulation are fit to reflect the results of experiment. These results show the value of application of the model for 3-D overbank flow.

关 键 词：水力学 非正交曲线坐标 漫滩流动 壁面函数法 κ-ε湍流模型 

分 类 号：TV131.4[水利工程—水力学及河流动力学]