덕트 내부 형상이 무인기용 덕티드 팬의 성능에 미치는 영향

Ducted fans that are popular choices in Vertical take-off and landing (VTOL) unmanned aerial vehicles (UAV) offer a higher static thrust/power ratio for a given diameter than open propellers. Although ducted fans provide high performance in many UAV applications, there haven"t been well-studied on the internal shape of ducts. In the present study, the aerodynamic characteristics of the ducted fan composed a 34cm diameter duct and 5 blades investigated based on Reynolds-Averaged Navier-Stokes (RANS) and SST model. RANS prediction of thrust performance was compared to the wind tunnel test data. Comparison of internal duct shapes shows results affecting the overall performance of the ducted fan. As the depth of furrow on the duct and tip clearance change, the thrust performance also changes.