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http://dx.doi.org/10.5139/JKSAS.2010.38.6.519

Numerical Flow Simulation of a UH-60A Full Rotorcraft Configuration in Forward Flight  

Lee, Hee-Dong (한국과학기술원 항공우주공학과 대학원)
Kwon, Oh-Joon (한국과학기술원 항공우주공학과)
Kang, Hee-Jung (한국항공우주연구원 로터팀)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.38, no.6, 2010 , pp. 519-529 More about this Journal
Abstract
In the present study, unsteady calculations have been performed to simulate flows around a UH-60A full configuration including main rotor, fuselage, and tail rotor. A flow solver developed for helicopter aerodynamic analysis was used for the simulation of the complete helicopter in high-speed and low-speed forward flight. Unsteady vibratory loads on the main rotor blades were compared with flight test and other calculated data for the assessment of the present flow solver. Aerodynamic interaction of the three components of the helicopter was investigated by comparing with the results of main-rotor-alone, main rotor and fuselage, and tail-rotor-alone configurations. It was found that the existence of the fuselage has an effect on the normal force distribution of the main rotor by varying downwash distribution on the rotor disc, and tip vortices trailed from the main rotor strongly interact with the tail-rotor.
Keywords
Full Helicopter Configuration; Unsteady Flow Analysis; Forward Flight; Aerodynamic Interaction;
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