三峡溢流坝下游冲坑流动特性研究  

Study of the flow characteristicsin the scour of downstream of Three Gorge spillway

作　　者：陈永灿[1,2] 冬俊瑞[1,2] 王艳明 

机构地区：[1]清华大学水利水电工程系 [2]上海市政设计院

出　　处：《清华大学学报（自然科学版）》1998年第1期115-118,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八五"科技攻关项目

摘　　要：针对三峡溢流坝下游冲坑水流的特点，利用正交网格变换原理，将复杂的冲坑水域变换成简单的矩形计算域，并与有限体积法有效地结合起来，能使变换后的控制方程形式简单又具有守恒形式，又利用模拟紊动能Ｋ及紊动能耗散率ε的紊流模型反映冲坑水流紊动特性，成功地实现了对三峡溢流坝下游冲坑流场和压强场的数值模拟。并将计算所得冲坑临底流速及冲坑底部压强与实验结果进行了分析比较，得到了实验结果的良好验证。Two dimensional flow in the scour of downstream of Three Gorge spillway is analyzed by employing an implicit numerical method. The Kε two equation turbulence model was employed to study the turbulent effects of the flow induced by the impinging jet in the scour. This method is well suitable for the irregular boundary of the scour because the irregular boundaryfitting coordinates system was used. The detailed distributions of velocity and pressure in the scour of downstream of the Three Gorge spillway are obtained and discussed. It is shown the numerical results of velocity and pressure near bottom of the scour agree well with the previous experiment data.

关 键 词：数值模拟 紊流模型 冲坑水流 溢流坝 

分 类 号：TV135.2[水利工程—水力学及河流动力学]