Experimental Investigation of the Rear Wall Effects on Aerodynamic Coefficients of an Airfoil with Cross-Flow Fan

Fan wing is a unique design which its main difference with common wings is that a cross flow fan is embedded along its span at the leading edge. The most important property of the fan wing is the ability to produce high lift force in low flight speeds and also thrust generation due to the fan rotation. Since the rear wall, which was not considered in the original model, is one of the most effective parts on the cross-flow fan performance, in this article the effect of this fan geometrical parameter has been investigated. The results show that by considering the rear wall, lift coefficient increases and decreases in small and large angles of attack, respectively. Besides, it causes the drag coefficient to increase and the magnitude of moment coefficient to decrease in all attack angles.