Cross-Flow Propulsion Fan Experimental Development and Finite-Element Modeling

The cross-flow propulsion fan (CFF) is a novel two-dimensional, two stage fan which can be integrated directly into a wing to provide both axial propulsive thrust and lift augmentation. The results of a recent experimental and theoretical development program improve the fan's performance in the transonic range and provide new insight into the flowfield. The overall performance of the CFF is presented in terms of conventional fan performance maps, together with detailed measurements of the interior flowfield. Analytical models based on finite-element modeling of the flow within the CFF produced good agreement with experimental data. The fan housing effects on the flowfield and overall performance are considered for the first time. The analytical model provides improved capability for designing CFF configurations that should lead to improved performance for future applications.