Aerodynamic design and numerical investigation of a highly loaded meridian acceleration fan

Considering the aerodynamic performance and manufacturing cost of civil fan,the aerodynamic design and three-dimensional numerical investigation of a highly loaded meridian acceleration fan were performed using three design schemes (uniform thickness tandem stator scheme,airfoil tandem stator scheme and uniform thickness single row stator scheme).The results indicate that the utilization of airfoil blade has few improvements on aerodynamic performance.The total pressure ratio and adiabatic efficiency of the airfoil tandem stator scheme are increased only by 0.18% and 0.8% respectively compared with the uniform thickness tandem stator scheme at near design point.The stall margin of the uniform thickness tandem stator scheme is increased by 11% than the uniform thickness single row stator scheme due to the suppression of the corner separation in the single row stator passage and the reduction of the passage blockage by the tandem stator.Considering aerodynamic performance and manufacturing cost the uniform thickness tandem stator scheme is selected as the final scheme of the fan and its performance characteristics at different rotating speeds can satisfy the design requirements.