DUCTED COUNTER-ROTATING FAN BLADES OPTIMIZATION BASED ON 3DINVERSE PROBLEM SOLUTION AIMING AT FAN GASDYNAMICSIMPROVEMENT

摘要

When developing counter-rotating fans for advanced aircraft engines with ducted blades (CRTF), it is very important to ensure high acoustic and aerodynamic characteristics [1, 2]. This paper presents some results of gasdynamic and aeroacoustic optimization of a ducted fan carbon composite blade on the basis of 3D- inverse problem solution [3]. A distinctive feature of a carbon composite blade as compared with a solid titanium blade is thicker leading and trailing edges and increasedmaximumbladeprofilethickness.