LTD：升力拖曳
“升阻比”（Lift-to-Drag Ratio）在技术文档和工程应用中常缩写为L/D或LTD，以简化书写与交流。这一术语广泛应用于航空航天领域，在美国国家航空航天局（NASA）的相关研究与飞行器设计中尤为常见。它指的是飞行器升力与阻力之比，是衡量气动效率的关键指标。
Lift-to-Drag的英文发音
例句
- At first the ballistic model of rocket projectile vertical launch is established, then it researches lift-to-drag ratio and influence of the angle of flight path on the firing range.
- 首先建立了火箭弹垂直发射的弹道模型，然后研究了升阻比、弹道倾角等参数的变化对火箭弹射程的影响，并分别对这两种情况进行了仿真。
- Effects of Leading-edge Vortex on Flutter Characteristics of High Sweep Angle Wing Much more increase of maximum lift-to-drag ratio can be obtained with a forward-swept main wing with a small sweepback angle leading edge.
- 大后掠翼前缘涡对其颤振特性的影响主机翼前掠角较小时，鸭翼改善和提高升阻比的效果比较明显。
- Through comparing the resistance force and maximum lift-to-drag ratio knowable triangle airfoil resistance is larger.
- 通过对比阻力以及升阻比可知三角翼型的阻力比较大。
- For this vehicle, the wing is sized to meet the re-entry aerodynamic requirements for hypersonic trim, stability, and lift-to-drag ratio, landing velocity.
- 机翼外形设计应使可重复使用运载器再入大气层以高超音速飞行和水平着陆时，满足配平、稳定性、升阻比、着陆速度等气动设计要求。
- The subcritical and supercritical computation of Lockheed-AFOSR wing B cases show that nonlinear distribution of thickness and negative twist angle could ameliorate the condition of flow field around the wing, which leads to higher lift-to-drag ratio, the optimization method is effective.
- 针对Lockheed-AFOSRWingB的亚临界和超临界算例结果表明，厚度的非线性分布和负的扭角会改善机翼流场的流动状态，使机翼的升阻比得到提高，优化设计方法是可行的。
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