coefficient of drag

1. 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。
2. By properly determining the coefficient of the shape drag and its beginning time of action the calculated results could agree well with the experimental data.
   适当选取形阻修正系数及修正项引入时刻，计算数据与数十公斤装药战斗部近区实验结果十分接近。
3. The Lagrange multipliers optimization method is presented for wing+ winglet configuration with constraint for lifting coefficient and wing root bending moment. By shaping the wing with winglet, decrease the sum of induced drag and profile drag, increase span efficiency and lift-drag ratio.
   采用Lagrange乘数优化方法，约束升力系数和机翼翼根弯矩，通过修改机翼+翼梢小翼组合体的结构外形，减小机翼的诱导阻力和形状阻力，提高机翼的展向效率和升阻比的大小。
4. Discussion on value of anti-lift coefficient of test piles, development of lateral friction drag and cracking of concrete pile body were made. The design suggestions about anti-lift piles were given out.
   分析试验所得数据，对试验抗拔桩抗拔系数的取值、侧摩阻力的发挥、混凝土桩身的开裂等进行了探讨，相应给出了抗拔桩的设计建议。
5. It is shown that a numerical method can calculate velocity deficits and width of the impeller viscous wakes, with the help of attenuation law of rotor blades wakes in axial flow compressors, and flow loss coefficient instead of blades drag coefficient.
   参照轴流压气机动叶尾迹衰减规律，利用流动损失系数代替叶栅阻力系数，给出了离心叶轮出口粘性尾迹速度亏缺值及其宽度的计算方法。
6. Identification model of drag coefficient for projectile was established by using the multi-section spline describing method of drag coefficient and ballistic mathematical model of unconventional projectile.
   采用阻力系数多段样条描述法和非常规炮弹弹道数学模型，建立弹丸阻力系数辨识模型。
7. 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%。
8. The drag coefficient of droplets is poorly understood now, On the basis of recent experimental results, an approach is pro-posed to measure the drag coefficient of droplets accelerated by shock waves.
   该文针对未完善的液滴群阻力系数的研究现状，根据近期的研究结果，利用激波通过分散颗粒群的加速原理，提出一种测量非定常条件下雾滴阻力系数的方法。
9. Experiment results show: the coefficient of drag force CD reduces, the coefficient of lift force CL rises and the XCP moves backward.
   实验结果表明：喷流后弹丸阻力系数下降，升力系数上升，压心后移，并对引起气动力变化的原因做了简要分析。
10. This paper tends to introduce the measurement equipments for the coefficient of hydrodynamic, such as active drag in freestyle, passive drag in towing or gliding after starting or turning, force on palms and total mechanical power efficiency during swimming.
    本文主要介绍游泳力学参数的测量设备，包括人游进时的主动阻力，牵引或出发转身后滑行时的被动阻力，手掌所受到的流体压力，以及游进时的总效率。
11. Put forward through a new thinking of setting up BP nerve network model to confirm drag coefficient of water supply pipe network. And make this model reach the ability to confirm drag coefficient through training, to make the satisfactory result and achieve the goal of studying.
    提出了通过建立BP神经网络模型确定给水管道阻力系数的新思路，并通过训练使该模型达到了确定阻力系数的能力，取得令人满意的结果，达到了研究目的。
12. In the end, the effect of coefficient of aerodynamic drag, rolling resistance coefficient and efficiency of powertrain on fuel economy are analysed.
    最后，分析了风阻系数、迎风面积、滚动阻力系数和传动系效率对整车燃油经济性的影响，为ISG-MHV进一步的优化设计提供了依据。
13. The rule of hook load and friction coefficient is applied to enhance predictive accuracy of frictional drag in new area or different BHAs and heighten utilization ratio of frictional drag. Drag theory can be combined with practice, and drill string mechanics analysis system is supplemented.
    利用钩载和摩阻系数的规律性，能够提高新区块或者不同钻具组合摩阻预测的准确性，增强现场施工摩阻的利用率，达到理论结合实际，丰富完善钻柱力学分析体系的目的。

noun

1. the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body

   Synonym:    drag coefficient