龙口垂向二维流场数值模拟  

Numerical Simulation of Vertical 2D Flows at Closure Gap of Reservoir

作　　者：赵庚润[1] 吴卫[1] 刘桦[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《力学季刊》2009年第2期250-256,共7页Chinese Quarterly of Mechanics

基　　金：上海市重点学科建设项目(B602)

摘　　要：根据物理实验的具体条件,应用基于RANS方程和VOF方法对堰流垂向二维流动进行了数值模拟。计算结果复演了堰流的四种典型流态,并与实验结果中水位、流速分布以及最大流速沿程分布相比较,表明数值模拟方法是可行的。以长江口青草沙水库主龙口施工过程为背景,在给定上下游不同水位差的情况下,对龙口垂向二维流动进行了数值模拟。给出了龙口大流速区的位置,比较了在不同龙口底槛高程的情况下龙口局部流场的变化特征。According to the particular sizes and boundary conditions of the experiments, the vertical two dimensional flows with free surface of weir flow were computed numerically. RANS equations and VOF method were used to simulate the flows with the violently deformed free surface. The numerical results of four different patterns of weir flow, the waterlevel and velocity, and the distribution of maxima velocity were compared with the experimental data. Based on the practice project of Qingcaosha reservoir in Yangtze estuary, the vertical two dimensional flows with free surface at the closure gap were computed. For the given water elevation at the open boundary, the position of maxima velocity were reported. The effects of the bed sill height on flow characteristics fields were discussed.

关 键 词：垂向二维流动 VOF方法 数值模拟 龙口 流态 

分 类 号：O242[理学—计算数学]