Airfoil Profile Reformation of Bladeless Fan and Investigation of Flow Increase Curve

In the present investigation, in spite ofintroducing the effective parameters in the Bladeless fan performance,the profile of fan cross section was studied precisely because it is the most important sectionof designing this kind of fan. In order to modify the fan cross section and by considering the similarity of bladeless fans to airfoils, five profiles were chosen among the standard airfoil profiles by considering the important geometric parameters such asradius of leading edge, maximum thickness of airfoil compatible with the original airfoil. In addition, five profile were designed to create uniform airflow in front of fan and to prevent the separation of flow as well as the manufacturing criteria. By solving the momentum and continuity equations for incompressible fluid, the flow was analyzed numerically in 3D form. The aerodynamic characteristics of the designed airfoils and the original airfoil of the Bladeless fan wereindicated and compared to eachother.The fan was located in the centerof a 4×2×2m room and Eppler473 airfoil profile was used as the cross section of this fan.Accoring tothe obtainednumerical results, the flow increase curve of the fan versus different inlet flowrate was depicted. The flow increase curve shows that the outlet flow rate increasedlinearely by increasing the inlet flow rate.