一种基于N—S方程的CFD／CSD耦合计算方法

对于气动弹性问题，在跨音速和大变形情况下，模态叠加法失效，为此需要探讨全场求解耦合方程的新方法。利用耦合计算流体动力学和计算结构动力学（CFD／CSD）方法，数值模拟了机翼的气弹响应问题。气动力的求解采用三维Navier—Stokes方程的有限体积法，实现了一种多块结构网格的动网格方法生成气动网格，采用有限元方法计算应...

CFD/CSD Couping Numerical Computational Method Based on N-S Equations

For the aeroelastical problems, the modal superpositon method would be invalid on the condition of subsonic and gross distortion. New method on coupling flow equations should be developed. The aeroelastical problem of wings is analyzed. Navier Stokes equations based on cell-centered finite volume discretization is used to obtain aerodynamic performance. To generate grids for CFD simulation, a multi-block, three-dimensional moving grid method is developed. Finite element equations are used to compute structural dynamics. Boundary information between the CFD and CSD codes is exchanged through the developed program. A coupling computational method of CFD and CSD is developed and a numerical simulation study of static aeroelastic for three-dimensional aircraft wing is carried out. The results show that using the developed CFD/CSD coupling procedure to solve aeroelastic problems is efficient and could be applied to the field of engineering design.