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http://dx.doi.org/10.5139/JKSAS.2012.40.1.12

Performance Analysis of Autorotation(2) : Performance of High Speed Autorotaion  

Kim, Hak-Yoon (한서대학교 항공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.40, no.1, 2012 , pp. 12-22 More about this Journal
Abstract
Performance variation of autorotating rotor was investigated. The shaft angle of the rotor is reduced while the flight velocity is increased. The BO-105 helicopter rotor blade was replaced by untwisted NACA 0012 airfoil and the rotor was simulated by using Transient Simulation Method(TSM) to judge the autorotation region for the variables. To simulate the compressibility effect at high speed flight, two-dimensional aerodynamic data was analyzed by compressible Navier-Stokes solver and Pitt/Peters inflow theory was adopted to simulate the induced velocity field. Thrust and lift coefficients, lift to drag ratio variations were investigated, also the lift and power were compared to those of BO-105 helicopter. Sharing lift and power between the autorotating rotor and wing was considered when the compound aircraft concept is introduced.
Keywords
Autorotation; Transient Simulation Method; Compound Aircraft;
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Times Cited By KSCI : 2  (Citation Analysis)
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