JAXA Special Publication: Proceedings of Lectures and Workshop International: Recent Advances in Multidisciplinary Technology and Modeling
巻
JAXA-SP-07-008E
ページ
112 - 120
発行年
2008-02-29
抄録（英）
Unsteady aerodynamics of two dimensional supercritical wing profile in transonic regime was investigated by Navier-Stokes code. First harmonic components of the unsteady aerodynamics obtained by simulation for forced oscillations of heaving and pitching mode were plotted to the amplitude of oscillations and it shows nonlinearity of the unsteady aerodynamics in small amplitude region. Stability analysis based on the first harmonic components of the unsteady aerodynamics also shows nonlinear trend. Limit Cycle Oscillation (LCO) of small amplitude about 0.1 deg could exist from the stability analysis and simulation was carried out, Nolinearity of unsteady aerodynamics in small amplitude range is affected by transition point, which interferes with unsteady pressure distribution in local supersonic region on upper surface. These computational results are described in this paper.
Nonlinearity of the unsteady aerodynamics of the viscous flow on supercritical wing in transonic regime
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