考虑弯道环流影响的平面二维水沙数学模型(Ⅱ)——模型的验证  

Two-dimensional sedimentation model of channel bend. Part 2. Verification and application

作　　者：易雨君[1] 王兆印[2] 张尚弘[3] 

机构地区：[1]北京师范大学环境学院,北京100875 [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [3]华北电力大学可再生能源学院,北京102206

出　　处：《水力发电学报》2010年第1期133-136,共4页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金项目(50909006);水资源与水电工程科学国家重点实验室开放研究基金(2009B059)

摘　　要：运用Chang的S型弯道断面流速分布和中性物质浓度分布,及实际河道的河床冲淤对修正后平面二维水流运动方程和悬移质不平衡输沙方程进行验证,并与修正前的模型进行比较。模拟结果发现修正后模型计算结果较修正前模型计算结果与实测值符合更好。表明二次流项及横向输沙项的加入能更有效地模拟出弯道处的环流水力特性及横向输沙特性。Flow simulation and neutral substance transport of the 2D model presented in Part 1 is calibrated and verified by using Chang（ 1971）＇s experimental data of S-shaped bend. Field data of Yichang reach from Gezhouba dam to Huyatan are adopted to verify sediment transportation and river bed erosion and deposition. Results show that if secondary flow effect and transverse sediment transport are modeled, then the calculations agree well with the measurements. Dispersion stresses are important in transverse momentum convection that causes the flow and sediment to move toward the outer bank.

关 键 词：泥沙动力学 二维水沙数学摸型 弯道环流 二次流 横向输沙 

分 类 号：TV134.4[水利工程—水力学及河流动力学]