Aero-Propulsive Interactions between UAV Wing and Distributed Propellers Due to Their Relative Position

The purpose of this paper is the evaluation aero-propulsive effects on a UAV wing model with distributed propulsion. An array three propellers placed ahead leading edge rectangular flap. investigation was performed high-fidelity numerical analyses to provide insights into phenomenology and screen interesting positions be validated in wind tunnel. propellers’ moved twelve different positions, allowing longitudinal vertical translations. has an untwisted constant section profile, single slot trailing-edge flap that deflected positions. span entirely covered by blowing. Results show increment lift, drag, pitching moment coefficients enabled. For given thrust level, magnitude such increments depends configuration, angle attack. lift enhancement sought propulsion applications comes at expense significant increase drag magnitude. In some combinations, wing’s contribution aircraft stability severely affected. Conversely, inflow altered increased all investigated configurations, small reduction propulsive efficiency.