梯形透水潜坝三维水流特性的数值模拟  

Numerical simulation of three-dimensional flow characteristics of trapezoidal permeable submerged dam

作　　者：王小明[1,2] 程永舟[1,3] 常留红[1,3] 徐斌[1] 

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410114 [2]长江航道规划设计研究院,湖北武汉430011 [3]水沙科学与水灾害防治湖南省重点实验室,湖南长沙410114

出　　处：《水利水电科技进展》2017年第5期51-56,共6页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(51679015);国家重点研发计划(2016YFC0402108);湖南省自然科学基金(2015JJ2006)

摘　　要：基于OpenFOAM开源程序包,对4种透空率(0.1、0.2、0.3和0.4)潜坝的三维流场进行数值模拟,研究了透空率和流量对透水潜坝周围三维水流特性的影响规律。结果表明:相同流量条件下,随着透空率增大,坝后回流减弱,上升流高度降低,缓流区范围减小,涡量减小,坝体腔内及坝后透水圆孔附近紊动能增大;相同透空率条件下,随着流量增大,坝后缓流区范围增大,回流逐渐减弱,掺混紊动作用加剧,涡量及紊动能的大小和影响范围也逐渐增大。Three-dimensional flow fields of submerged dams with four permeable rates（0.1,0.2,0.3,and 0.4） were numerically simulated based on the OpenFOAM open source package,and the influence of the permeable rate and discharge on the three-dimensional flow characteristics around permeable submerged dams was examined.The results show that,under constant discharge conditions,with the increase of the permeable rate,the reflux behind the dam is weakened; the upwelling height,the range of the slow-flow area,and the vorticity decrease; and the turbulent kinetic energy in the dam and near the permeable circular hole behind the dam increases.Under constant permeable rate conditions,with the increase of the discharge,the range of the slow-flow area behind the dam increases,the reflux is gradually weakened,the mixing is aggravated,and the vorticity and turbulent kinetic energy as well as their influence ranges increase.

关 键 词：透水潜坝 透空率 流场 涡量 紊动能 三维水流特性 

分 类 号：TV135[水利工程—水力学及河流动力学]