It is very important to reduce the aerodynamic drag and noise for traveling vehicles.
减低汽车行驶中的空气阻力、抑制其行驶时的气动噪声具有十分重要的意义。
To decrease aerodynamic drag, it is important to improve aerodynamic contour of train.
为了减小空气阻力，列车车厢气动外形的研究变得愈加重要。
The mechanism of reducing aerodynamic drag by acoustic excitation was briefly analyzed.
本文首先简要地分析了声激励减阻机理。
The mechanism of reducing aerodynamic drag by acoustic excitation was briefly analysed.
本文首先简要地分析了声激励减阻机理。
It is shown that the technique can obviously reduce the aerodynamic drag coefficient of the model.
结果表明：内部声激励能够明显地降低车身模型的空气阻力系数。
Using characteristics of plasma to reduce aerodynamic drag of vehicles is a new concept of reducing drag.
利用等离子体的特性减小飞行器的气动阻力是一种新概念的减阻思路。
The order of total slenderness ratios of the five trains is as same as that of aerodynamic drag coefficients.
计算得到的不同流线型列车的整体长细比大小排序与其气动阻力系数排序完全一致。
By extending length of the test floor properly, the aerodynamic drag coefficient can be measured more precisely.
适当延长地板，可提高气动阻力系数的测量精度。
The aerodynamic drag of different models at zero angle of attack in the experiment is calculated using the simplified procedure.
在零攻角实验时不同模型的空气动力阻力是采用简化方法来计算的；
The numerical simulation research on aerodynamic drag of train affected by the train windshield configuration is performed in this paper.
采用数值模拟方法研究了列车风挡对空气阻力的影响。
The relationship between airflow characteristics and aerodynamic drag and the variation of aerodynamic drag with basic structural parameters were obtained.
揭示了气流流动特性和厢式货车气动阻力特性之间的关系；厢式货车基本结构参数变化时阻力特性的变化规律。
The 12.6% of original fuel energy that makes it to the wheels must provide acceleration (5.8 %) and overcome aerodynamic drag (2.6%) and rolling resistance.
传到车轮的12.6%的能量，必需提供车辆加速(5.8%)、克服空气阻力(2.5%)和克服滚动阻力。
Then compute aerodynamic drag of high temperature particle at different temperature difference and fit the formula according to the computational data points.
计算了颗粒与气体不同温差情况下高温颗粒的气动阻力，并根据计算数据点拟合了计算公式。
It is very complex to calculate the aerodynamic drag of high-speed train running in railway tunnel with multi -shafts. And the difficulty is to calculate the velocity of piston wind.
在高速列车空气阻力计算中，多竖井隧道的列车空气阻力计算比较复杂，其难点在于多竖井的活塞风计算。
The aerodynamic shape design of train head should consider all kinds of factors because the relation between reducing aerodynamic drag and air pressure pulse may be conflictive and uniform.
减小列车空气阻力和降低列车交会压力波，既矛盾又统一，列车气动头部外形设计需要综合考虑各种因素。
To study the effect of aerodynamic drag in the solar array spreading on the ground, a calculation method of time-varying aerodynamic drag was put forward based on dynamic meshes in this paper.
为研究太阳帆板地面展开试验中气动阻力的影响，基于动网格技术提出了一种时变空气阻力计算方法。
At altitude, the air pressure is lower, and so are aerodynamic effects such as drag and lift, ultimately causing balls to travel faster and straighter than they would at lower altitude.
由于地处高海拔地区，气压较低，因而作用在球上的阻力及升力所产生的空气动力效应也会发生相应反应，最终导致球在空中飞行速度比在低海拔地区快，飞行的路线也更直。
If you keep your Windows up your car will be subject to less drag, which improves the aerodynamic profile of the vehicle.
如果你开着窗，根据车辆空气动力学的外形，你的车受的阻力较少。
Increasing the lift drag ratio of turbine blade is an effective way for improving turbines aerodynamic characteristics.
提高叶轮机械叶片的升阻比，是改进叶轮机械气动性能的重要途径。
This also optimizes wing shape and reduces the potential need for bulging aerodynamic surfaces, which in turn reduces drag and increases airplane performance.
这些优势有助于优化大翼外形并减少气动凸表，从而减小阻力并提高飞机的性能。
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。
The working principle of the plant and the relation between the aerodynamic force and the drag of water lifting are discussed.
文中分析了该装置的工作原理，气动力与提水阻力的关系；
The experimental results of the effect of base bleed propellant composition on the aerodynamic performance of drag reduction and range increase of base bleed projectile.
介绍了底排药剂成份对底排弹减阻增程气动力性能影响的实验结果。
The result is the five metre long aerodynamic satellite equipped with low power ion thrusters to compensate for atmospheric drag.
其结果是，5米长的空气动力卫星配备了低功耗的离子推进器，以补偿大气阻力。
Calculate the lift and drag over simple aerodynamic shapes in compressible, inviscid flows.
能估算可压缩无粘流中，基本空气动力外形的升力和阻力。
Compared with the fin without bulges, the aerodynamic characteristics of the a fin with a bulge are changed, especially for the drag.
与无鼓包的舵相比较，带有鼓包的舵其气动特性，尤其是阻力有所变化。
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。
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 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。
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