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Article
Journal of the KSAS 2022; 50(1): 1-12.
DOI: https://doi.org/10.5139/JKSAS.2022.50.1.1
Experimental Study on Aerodynamic Performance and Wake Characteristics of the Small Ducted Fan for VTOL UAV
수직 이착륙 무인기용 소형 덕티드팬의 공력성능 및 후류특성에 관한 실험적 연구
S. H. Shin*, S. H. Lee**, Y. W. Kim** and T. H. Cho*
신수희*, 이승훈**, 김양원**, 조태환*
UST*, KARI*,**
과학기술연합대학원대학교*, 한국항공우주연구원*,**
Abstract
Wind tunnel test for a small scale electric ducted fan with a 104mm diameter was conducted to analyze the aerodynamic characteristics when it was used as a propulsion system of tilt-propeller UAV. Experimental conditions were derived from flight conditions of a sub-scaled OPPAV. Forces and moments of the ducted fan model were measured by a 6-axis balance and 3-dimensional wake vectors which could induce an aerodynamic influence in the vehicle were measured by 5-hole probes. Thrust and torque on hover and cruise conditions were measured and analyzed to drive out the operating conditions when it was applied in the sub-scaled OPPAV. On transition conditions, thrust keep its value with tilt angle variation below 40˚ and increase after that. But, sideforce increase constantly until 75˚. The maximum axial velocity in the wake on hover and cruise conditions was around 60m/s and tangential velocity was around 12m/s. The position of the maximum axial velocity and vortex center move off the fan rotation center line as the tilt angle increases.
Keywords
Small Scale Ducted fan, Wind Tunnel Test, Aerodynamic Characteristics, 3-Dimensional Flow Field
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