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描述了一种基于贴体网格的Euler和N-S方程自适应算法。采用中心有限体积法,对Euler及N-S方程进行数值求解,N-S方程的计算中加入了基于SA湍流模型的DES模型。在流场中,运用了网格自适应算法,提高了数值计算对激波、流动分离、涡等特性的捕捉和分辨能力。采用上述方法,数值分析了单段翼型的绕流问题。文末给出的2个二维问题的对比算例表明本文方法有效。
An adaptive algorithm for Euler and N-S equations based on ontology grid is described. Euler and N-S equations are numerically solved by the central finite volume method. The DES model based on the SA turbulence model is added into the calculation of the N-S equation. In the flow field, a grid adaptive algorithm is used to improve the ability of numerical calculation to capture and resolve shock, flow separation and vortex characteristics. Using the above method, the problem of flow around a single airfoil is analyzed numerically. The comparison example of two two-dimensional problems given at the end of this paper shows that the method in this paper is effective.