Design Optimization of Blade's Stacking Line Based on Fluid-structure Coupling Technique

This paper presents an approach for numerical optimization design of blade stacking line for fan/compressor blade. In the present method, the linear interpolation method and Constant-Volume Tetrahedron approach are developed to exchange data between a Navier Stokes equation solver which is adopted to evaluate the aerodynamic performance and a commercial software which is used to attain the structural characteristics. Both of those two data exchange method have been demonstrates. A simple Genetic Algorithm as a robust design optimization tool is employed to achieve the multi-objective optimization. The proposed approach is then used to optimized a fan rotor blade with different optimization goals to verify the feasibility of the reliability. The results show that, the single objective optimization design can improve the aerodynamic performance or structural characteristics remarkably, but might not promote both of those performances. On the contrary, the multi-objective and multidisciplinary design can improve the aerodynamic performance and structural strength at the same time. So, it can attain higher aerodynamic performance while satisfying the blade strength requirements.