Numerical investigation of aerodynamic performance and noise characteristic of air multiplier bladeless fan

Abstract

Air multiplier fans, which are produced as an alternative to the convectional propellers used today, have come into prominence with the advantages providing in both efficiency and usage. In this study, three different blade profiles based on NACA 0012, NACA 1408, and EPPLER 1214 were used in the fan body. The design based on the NACA 0012 of body profile provided the highest flow rate. This profile was optimized using CFD analysis according to seven different geometrical parameters determined as the angle of attack, width, length, gap, inner and outer diameters, and tail length. The profile that provides less noise against the highest flow rate was determined as the optimal design. With CFD analysis, the sound pressure level of the optimal design was calculated by the k-ω and LES method, and the results were compared with each other.