大伙房水库主溢洪道三维流场数值模拟

Three Dimensional Numerical Simulation of Main Spillway Overflow in the Dahuofang Reservoir

采用RNGk-ε双方程模型模拟湍流,利用流体体积分数法(VOF)确定自由水面线,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,成功地对大伙房水库主溢洪道流场进行了三维紊流数值模拟,得到了自由水面、溢洪道堰面压力、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吻合较好。

In this paper, the RNG two-equation turbulence model was used to simulate the three-dimensional turbulence flow. The volume of fluid method （VOF） was introduced into the iteration of calculation,to solve the curved free water surface, The adaptive Cartesian grid and the fractional area volume obstacle representation method（FAVOR ） was used to barge the complex boundary condition and the turbulence flow field of main spillway in the Dahuofang reservoir was simulated successfully. The curvilinear free surface, the magnitude and distribution of the velocity, the pressures on the spillway surface, three-dimensional flow field distributions were obtained . The calculated result was in good agreement with the experimental data.