Influence of geometric deviations of the fan blade airfoil on aerodynamic and mechanical integrity

Abstract

Abstract A technology for robust multi-criteria optimization of the fan blades with real deviations of airfoil geometry is proposed which includes simultaneously solving aerodynamic and mechanical integrity problems as well as balancing and arranging the blades in the row. In accordance with this technology, automated measurements of blades airfoil geometry (more than 1200 points) are used to automatically create a blade “cold” 3D model, meshing, and static and dynamic analysis of mechanical integrity. Then the model and mesh are automatically transformed in a “hot” condition and an aerodynamic analysis is carried out to estimate the measured geometry influence on fan parameters. Finally, arrangement of blades in the row is carried out based on static moments and aerodynamics analysis. The final stages of this technology are presented in this paper more detail.