多弯道溢洪道水力特性数值模拟研究

Study on numerical simulation of hydraulic characteristics for multiple curved spillway

文中在物理模型试验的基础上,对多弯道溢洪道进行了数值模拟研究。采用FLUENT软件,引入适用于分层两相流的流体体积分数(VOF)模型求解自由水面曲线,成功地对龙屯水库多弯道溢洪道进行了三维紊流数值模拟,得到了自由水面、溢洪道底板压力、断面流速大小和三维流场的分布规律,并将数值模拟结果与试验结果进行了分析对比,两者基本吻合。试验结果表明:合理的选择数值模拟模型及参数,可以很好地模拟水流流态,可为工程所用。

The paper studies the numerical simulation for the multiple curved spillway based on the physical model test.The FLUENT software is successful used in the three-dimensional turbulence numerical simulation for the multiple curved spillway of Longtun reservoir,introducing the model of fluid volume fraction(VOF) to adapt stratified two-phase flow for solving the free water surface curve.The numerical simulation obtains the distribution regularities of the free water surface,the spillway bottom floor pressure,the section flow velocity and the three-dimensional flow field.The comparative analysis shows that the numerical simulation result and the test result are mostly consistent.The study results show that the reasonable choice of the numerical simulation model and parameters could simulate the flow regime well for projects.