The change rules of aerodynamic parameters including liftcoefficient, drag coefficient and pitch moment coefficient have been analyzed when Angle of attack and fuel flow rate is changed.
考虑了不同飞行攻角、不同燃料流率下气动参数，包括升力系数、阻力系数和俯仰力矩系数的变化规律。
2
After aerodynamic optimization of an unmanned vehicle with the methods mentioned above, the liftcoefficient has an increase of 21 % and the ratio of lift to drag has an increase of 6. 7%.
通过优化无人机外形取得了有意义的结果，优化后升力系数增加了21%，升阻比提高了6.7%。
3
Such parameters of flow characteristics are investigated as lift and dragcoefficient and vortex shedding frequencies.