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流体力学控制方程的数值求解过程中,当网格加密、粘性效应强或来流马赫数低的时候,流场收敛非常缓慢。本文在多块网格、LUSGS隐式格式基础上采用多重网格技术,计算了NLR7301case#1两段翼型的低速绕流及DLRF4跨声速流场,在复杂二维、三维粘性流场求解中获得了满意的加速收敛效果。文中还比较了V循环、W循环的加速效率,为多重网格的工程应用奠下基础。
In numerical solution of the hydrodynamic governing equations, the flow field converges very slowly when the grid is encrypted, the viscous effect is strong, or the Mach Mach number is low. Based on multi-grid and LUSGS implicit schemes, the multi-grid technique is used to calculate the low velocity flow around the NLR7301case # 1 two-stage airfoil and the transonic velocity field of DLRF4. In the solution of complex 2D and 3D viscous flow fields Get a satisfactory acceleration convergence effect. The paper also compares the V-cycle, W-cycle acceleration efficiency, laying the foundation for the engineering application of multi-grid.