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本文将有限分析方法用于曲线座标系上紊流 N- S方程数值计算 ,研究了高雷诺数时叶栅粘性紊流流场。有限分析方法在网格单元上对非线性偏微分程进行线化处理 ,在解析边界条件下求出线化偏微分方程的解析解 ,以此解构造离散方程。有限分析方法能够根据对流的方向和大小自动改变格式系数 ,并具有数值扩散小、精度高和稳定性好等优点。本文以 k- ε紊流模型模化紊流 ,以壁面函数方法处理近壁区流动参数。计算结果与实验数据的吻合程度令人满意
In this paper, the finite analysis method is applied to the numerical calculation of the turbulence N- S equation on the curvilinear coordinate system, and the viscous turbulent flow field of cascades at high Reynolds number is studied. Finite analysis method is used to linearize the nonlinear partial differential equations on the grid element, and the analytic solution of the linear partial differential equations is obtained under the analytic boundary conditions to solve the discrete equations. The finite analysis method can automatically change the format coefficient according to the direction and size of the convection and has the advantages of small numerical diffusion, high precision and good stability. In this paper, the k-ε turbulence model is used to model turbulence and the wall function method is used to deal with the flow parameters in the near wall. The calculated results are in good agreement with the experimental data