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http://dx.doi.org/10.5139/JKSAS.2012.40.5.413

Experimental Study on the Aerodynamic Characteristics of the Ducted fan for the Propulsion of a Small UAV  

Ryu, Min-Hyoung (한양대학교 기계공학과 대학원)
Cho, Lee-Sang (한양대학교 기계공학과 대학원)
Cho, Jin-Soo (한양대학교 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.40, no.5, 2012 , pp. 413-422 More about this Journal
Abstract
The ducted fan for a small UAV propulsion can reconnoiter and observe in a town and a small area, it has better thrust efficiency and a long endurance than propeller. Thrust characteristics of hover and for ward flight condition for the ducted fan UAV is important issue to improve a endurance. The unsteady 3-dimensional flow fields of the ducted fan UAV is essential to stable flight. In this paper, to verify the design results of the ducted fan and to investigate a stable aeronautical characteristic, the thrust performance and the unsteady 3-dimensional flow fields are measured. Thrust characteristics for the hovering and the forward flight conditions are measured by the 6-components balance system in the subsonic wind tunnel. The unsteady 3-dimensional flow fields are analyzed by using a stationary $45^{\circ}$ slanted hot-wire technique. The swirl velocity is almost removed behind the stator blades. Therefore, the thrust performance of the ducted fan is improved and the flight stability is maintained.
Keywords
Ducted Fan UAV; Thrust Characteristics; Slanted Hot-Wire; Unsteady 3-Dimensional Flow Field;
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