Abstract
Effects of fixed hub cone and rotating hub cone are equipped jet fan, and power cable on the noise characteristics of fan were investigated in this research. The noise of jet fan is equipped fixed hub cone is higher than that of rotating hub cone. Because in the former, the turbulent flow due to eight struts which are supporting fixed hub cone flows into the rotor. By attaching the case which made the aerofoil form the power cable, the width of wake which flows in to the rear rotor can be made narrow, the fan noise can be reduced.
