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Investigation of the tip clearance effect in a counter-rotating ducted fan for VTOL UAV
- Authors
- Ryu, Minhyoung; Cho, Lee sang; Cho, Jin Soo
- Issue Date
- Sep-2014
- Publisher
- International Council of the Aeronautical Sciences
- Keywords
- Aerodynamic analysis; CFD; Duct; Ducted fan; Tip clearance; Wind tunnel
- Citation
- 29th Congress of the International Council of the Aeronautical Sciences, ICAS 2014, pp 1 - 5
- Pages
- 5
- Indexed
- SCOPUS
- Journal Title
- 29th Congress of the International Council of the Aeronautical Sciences, ICAS 2014
- Start Page
- 1
- End Page
- 5
- Abstract
- The tip clearance effect on counter-rotating ducted fan of VTOL UAV in hovering condition, was investigate using computational analysis. The numerical results of baseline model are validated by wind tunnel test in hovering and forward conditions. It is observed that if tip clearance of one rotor in the counter-rotating ducted fan increase then the thrust coefficient of another rotor increases. In Addition to this, when the tip clearance of the rear rotor increases, the thrust of the ducted fan is improved due to increasing of average total pressure at exit plane.
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