Abstract:

The unsteady aerodynamic characteristics of waverider aircraft is one of the most important physical problems in hypersonic flight. In this paper, the forced rolling movement about the symmetry axis at a fixed angle of attack is numerically simulated. The effects of different frequencies and rolling angles on the aerodynamic characteristics are also compared. The latest AUSM+up scheme of AUSM kind is also used in the simulation. The results indicate that the highpressure air can well be attached to the undersurface of the waverider aircraft when the waverider aircraft is rolling. So the waverider aircraft designed by the authors has good aerodynamic characteristics. When the rolling frequency is high, the hysteresis of lift force appears because of the angular velocity inducement. When the waverider aircraft is rolling, the rolling moment is negative, which provides positive damping. The “wing rock” of waverider aircraft does not appear.

Key words: waverider , aircraft,  , AUSM+up , scheme,  , rolling , movement,  , stability