基于有限体积法研究溢洪道水流最佳湍流模型

The Optimal Turbulence Model of Spillway Flow Based on Finite Volume Method

反弧形溢洪道是用于控制洪水的最重要的结构。随着计算机科学和各种计算流体动力学软件的发展,极大实现了在费用较低的同时,能在较短的时间内对反弧形溢洪道的特性进行研究。利用数值计算方法和Fluent软件分析了不同参数对反弧形溢洪道溢流的影响。基于Gauss-Seidel收敛条件,用0.01 s的步长进行方程的收敛和控制。结果表明,采用RNG k-ε湍流模型,可以提高溢洪道溢流计算结果的准确性。该方法的相对误差为9.687,表明该方法具有较高的精度。而SPSS软件的决策准则(P-value)约为0.000 006,远低于0.05,因此可以认为此数值研究具有较高的精度。数值模型与Flow-3D软件及其他数值和实验室方法的结果对比表明,该方法具有较高的精度。

The reverse arc spillway is the most important structure used for flood control. With the development of computer science and various computational fluid dynamics software, it is greatly realized to study the characteristics of reverse arc spillway in a short time at a low cost. Numerical calculation method and Fluent software are used to analyze the influence of different parameters on the overflow of the arc-shaped spillway. Based on the Gauss Seidel convergence condition, the equation is convergent and controlled with a step of 0.01 seconds. The results show that RNG k-ε Turbulence Model can improve the accuracy of spillway overflow calculation.The relative error of this method is 9.687, which indicates that this method has high accuracy. However, the P-value of SPSS software is about 0.000006, which much lower than 0.05. Therefore, it can be considered that this numerical study has a high accuracy. The comparison between the numerical model and Flow-3D software and other numerical and laboratory methods shows that the proposed method has high accuracy.