Multi-Objective Design of a Distributed Ducted Fan System

The distributed propulsion system applied to the vertical take-off and landing aircraft must maintain high performance in both hover cruise flight. gap of power unit has an adverse effect on ducted fan system, especially Therefore, a new was proposed, which eliminated design, adjusted contraction expansion wake through deflectable induced wing arranged behind ensure efficiency different flight phases. Then, multi-objective design method feasibility verified by designing inlet outlet duct wing. Design results show that change mainly came from inlet. By increasing length height inlet, flow separation alleviated thrust increased hove flight, but drag became larger. increase made operating point blade far away difficulty design. Compared with composed traditional circular fan, hovering load reduced 3.703%, 17.372%, spanwise space 20% final