小半径 大底坡溢洪道弯道水流三维流场数值计算分析  

Analysis of numerical calculation of three-dimensional flow field for bend flow of spillway with small radius and steep base slope

作　　者：董延超[1] 曲洋[2] 刘杰[1] 

机构地区：[1]中水东北勘测设计研究有限责任公司,吉林长春130021 [2]水利部松辽水利委员会,吉林长春130021

出　　处：《东北水利水电》2013年第9期6-8,66,共4页Water Resources & Hydropower of Northeast China

摘　　要：水利枢纽溢洪道设计过程中常遇到陡槽弯道水流问题,复杂的弯道水流流态直接影响建筑物的布置和运行安全,对溢洪道陡槽弯道水力特性的研究具有现实和理论意义。本文采用RNGk-ε双方程模型模拟紊流,流体体积分数法(VOF)追踪自由水面,笛卡尔自适应网格与部分面积体积障碍模拟法(FAVOR)处理复杂的几何边界,成功地对小半径、大底坡溢洪道陡槽弯道流场进行了三维紊流数值模拟,得到了自由水面、断面流速大小、分布和三维流场的分布规律,结果分析表明数值模拟与物理实验结果两者吻合较好。The question of the chute bend flow often encounters in the spillway design of the hydro junction.Because the complex bend flow pattern affects directly the layout and operation safety of the structure,it has the theoretical and practical significance to study the hydro characteristics of spillway chute bend flow.The paper finishes successfully the three-dimensional turbulence numerical simulation for the chute bend flow pattern in spillway with small radius and steep base slope by using the RNG two-equation model to simulate the turbulence,the volume of fluid method(VOF) to track the free water surface,the adaptive Cartesian grid and the fractional area volume obstacle representation method(FAVOR) to handle the complex boundary condition,obtains the magnitude and distribution of the velocity of the free water surface and the section,and the distribution of the three-dimensional flow field.The results show that the numerical simulation results agree well with the physical experimental ones.

关 键 词：溢洪道 弯道水流 紊流数值模拟 RNGk-ε湍流模型 

分 类 号：TV651.1[水利工程—水利水电工程]