1) the maximal ratio between lift force and resistance
最大升阻比法
1.
The suitable control process of the lift-canards is analyzed by using respectively the sequence quadric pro- gramming and the maximal ratio between lift force and resistance.
文中阐述了滑翔增程弹的飞行过程,建立了滑翔弹在纵向平面内的弹道模型,分别采用序列二次规划法和最大升阻比法。
3) optimal ratio of lift over drag
最佳升阻比
1.
Research about synchronous pitch-controlled wind turbine has found its shortage,put forward the conception that to keep the blade always in the state of optimal ratio of lift over drag,the turbine must has one asynchronous pitch-control system.
针对当前同步变桨距式风力机的变桨特点,总结同步变桨距式风力机缺点,提出要使叶片始终处于最佳升阻比状态必须实现风力机的异步变桨这一观点。
4) Maxshift
最大提升法
5) Hartley's test
最大F比法
6) lift-drag ratio
升阻比
1.
The results show that the best effect of glide extended-rang is obtained with the adoption of maximum lift-drag ratio slide.
由数值分析得到采用最大升阻比的滑翔策略可获得最佳滑翔增程效果。
2.
The lift coefficient,drag coefficient and lift-drag ratio were obtained at a series of angles of attack, starting at 0°up to 16°at 2° intervals respectively.
利用XFO IL和FLUENT软件对NACA4412翼型(原型)及其多种改型的空气动力性能进行了数值模拟,分别对比计算了翼型在攻角为0°、2°、4°、6°、8°、10°、12°、14°和16°情况下的升力系数、阻力系数和升阻比,以改善其翼型性能;并在地效场中离地间隙分别为0。
3.
Several conclusions can be drawn: Firstly,the maximal lift-drag ratio Kmax=3.
计算结果表明该布局在Ma=6的时候,最大升阻比Kmax可以达到3。
补充资料：升阻比
又称“举阻比”、“空气动力效率”。飞机飞行中，在同一迎角的升力与阻力的比值。其值随迎角的变化而变化，此值愈大愈好，低速和亚声速飞机可达17～18，跨声速飞机可达10～12，马赫数为2的超声速飞机约为4～8。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条