| Citation: | MA Binlin, SU Xinbing, FENG Haoyang, et al. Control characteristics analysis of split rudder of elastic forward swept wing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(9): 1849-1858. doi: 10.13700/j.bh.1001-5965.2017.0142(in Chinese)
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Aimed at the influence of elastic deformation on the control characteristics of split rudder for the forward swept wing (FSW) aircraft, the computational fluid dynamics/computational structural dynamics (CFD/CSD) loose coupling static aeroelastic numerical calculation method was adopted. The calculation and analysis on control characteristics of the split rudder with rigid and elastic wings were performed under the subsonic condition. The simulation had highlighted the influence of wing deformation on the control characteristics of the rudder. The calculation result shows that, when the right side split rudder opens, compared with rigid wing, the stall attack angle of the elastic wing advances about 2°, the attack angle of maximum lift-drag ratio advances about 1°, the yaw effect at small attack angle is enhanced, the "pits" phenomenon of right-roll moment and roll moment appears, and the trend of yaw at high angle of attack advances about 8° with more violent roll action; under the influence of sideslip, the decrease extent of the yawing moment with the increase of sideslip angle is larger than that of the rigid wing, and the roll moment has completely opposite result; under the action of down moment proving by rudder, the increase extent of the yawing moment with the increase of sideslip angle is larger than that of the rigid wing. By comparison, the control characteristics of split rudder for the elastic FSW have a distinct difference with rigid FSW.
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