Static aeroelastic optimization with CFD method

A new approach to the optimum design of elastic wing is presented with computational fluid dynamics (CFD) and computational structural dynamics (CSD) method. Finished the aerodynamic analysis with solving the 3-dimensional Navier-Stokes equations, coupling with static aeroelastic balancing equation, the multidisciplinary design optimization (MDO) of wing is investigated in order to satisfy the flying character requirement of aircraft. Throughout the whole optimization process, the accuracy of result is raised because of the numerical simulation of flowing field around wing with Navier-Stokes equations solutions, and the computation time is reduced significantly because the time averaged compressible Navier-Stokes equations are solved by the implicit LU-NND algorithm. One example is presented, the design of a sweep wing, to demonstrate the efficiency of the methodology, and the results are in good agreement with some data.