【摘要】 本文采用非正交网格控制容积法及ｋ—ε二方程紊流模型，求解二维时间平均Ｎ－Ｓ方程，对反弧段紊流进行数值模拟．计算中分别采用了标准的和考虑曲率修正的ｋ－ε紊流模型．后者计算结果与实测值符合良好．本文亦讨论了位置未知的自由水面的处理．更多还原

【Abstract】 A mathematical model for simulating turbulent flows on spillway bucket is presented. Non-orthogonal finite volume method was adopted to solve the two-dimensional time-averaged N-S equations with the k-ε turbulence model.Both standard k-ε model and its curvature correction version have been used in calculations. With standard k-ε model, the computational value of turbulent kinetic energy is significantly less than that of the measured data. When curvature correction version is used. the calculated results of turbulent kinetic energy show good agreement with the experimental one. The agreement between the predicted and measured velocity profiles has also been improved. The determination of the free surface location, which is unknown, has also been studied.更多还原