The change rules of aerodynamic parameters including lift coefficient, 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。
Such parameters of flow characteristics are investigated as lift and drag coefficient and vortex shedding frequencies.
计算了圆柱的升阻力系数、尾涡脱落频率等描述绕流问题的主要参量。
After aerodynamic optimization of an unmanned vehicle with the methods mentioned above, the lift coefficient 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%。
The coefficient of drag and coefficient of lift in the circumstance of rotating wheels is lower.
汽车在车轮旋转情况下，阻力系数和升力系数比车轮静止情况下的低。
When the ratio of height to width increases, the lift coefficient aggrandizes, and the drag coefficient diminishes.
其高宽比增加，升力系数增大，阻力系数减小。
The drag coefficient derived from filed measurement was 15 percent less than that of wind tunnel test. On the contrary Reynolds number has a minimal effect on lift force and moment coefficient.
结果表明：雷诺数对阻力系数影响较大，现场实测值比风洞试验所得值小约15％，对升力系数及力矩系数影响较小。
The unique aim of aerodynamic designer is always to enhance lift coefficient and reduce drag coefficient.
增升减阻一直是空气动力设计工作者追求的目标。
The joined-wing configuration, as compared with the normal configuration, is characterized by low structural weight, small induced drag, big lift coefficient and good stability.
联结翼布局与常规布局相比具有结构重量轻、诱导阻力小、升力系数大和稳定性良好的特点。
Also the effect of different ice shapes on lift and drag coefficient were assessed. The results indicate that the glaze ice has the most adverse impact on airfoil aerodynamic performance.
另外还计算了不同的冰形对机翼升、阻力的影响，结果表明瘤状冰对机翼气动特性的影响最大。
Also the effect of different ice shapes on lift and drag coefficient were assessed. The results indicate that the glaze ice has the most adverse impact on airfoil aerodynamic performance.
另外还计算了不同的冰形对机翼升、阻力的影响，结果表明瘤状冰对机翼气动特性的影响最大。
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