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利用同位非结构化网格上的压力加权修正算法 ,对翼型湍流绕流进行了数值分析。详细地给出了一孤立翼型在不同攻角下的分离流结构及翼型表面压力分布 ,为了显示非结构化网格方法在求解多连通流动区域的优越性 ,对双翼型绕流进行了数值计算。在数值分析中 ,对阵面推进法进行改进来生成三角形网格 ,采用有限控制体方法直接在物理空间中的非结构化网格单元上离散 Navier- Stokes方程及 k- ε方程 ,形成的代数方程组通过预条件矩阵共轭梯度平方法求解。计算结果表明 :当流动为附着流时 ,计算结果与实验值吻合程度令人相当满意 ;而在分离区内 ,计算结果与实验值存在一定的误差 ,需对分离区内的湍流模型做进一步的改进。
By using the pressure-weighted correction algorithm on the same-site unstructured grid, the numerical simulation of airfoil turbulent flow around is presented. In order to show the superiority of the unstructured grid method in solving the multi-connected flow area, the flow around the two wings is given Numeral Calculations. In the numerical analysis, we improve the frontal approach to generate a triangular mesh. The finite control volume method is used to directly discretize the Navier-Stokes and k-ε equations on the unstructured grid elements in the physical space. The resulting algebraic equation Groups were solved by the preconditioned matrix conjugate gradient method. The results show that when the flow is attached to the flow, the calculated results are in good agreement with the experimental values. However, there is some error between the calculated results and the experimental values in the separation zone. The turbulence model in the separation zone needs to be further Improve.