Vibrating in the wind, the bristles create some drag. But they also reduce the wing's slipstream, an area of low-pressure turbulence that pulls back on the wing, and hence reduce drag.
风中振动时，刷毛会产生反作用力，但同时它也可以减少机翼滑流，产生一个低气压乱流，机翼上形成回力，因而减小阻力。
The combination of low pressure on one side and high pressure on the other creates a drag force that must be overcome — a significant waste of energy.
为此，必须浪费大量能源以克服压力差产生的拉力。
The low-pressure area reduces wind resistance and hence the amount of drag, which means less energy is needed to maintain the same speed as the leader.
在低压力区，空气阻力减少，向后拉的力量减小，因此只需要消耗较少的能量就可维持与在前面的竞争对手相同的速度。
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。
The pressure drag comes from the front of the swimmer exposed to the water and the flow separation behind the swimmer.
压力带来的阻力来自于游泳者的前部对水面以及后部流体分层。
As airfoil thickness is increased, the average pressure drag, affected by leading edge vortex is reduced even to be negative, and meanwhile friction has little increase.
由于前缘涡的影响，翼型厚度增加，平均压差阻力系数变小，甚至会出现负值。
But, pressure drag is the main concern (worry) and if it is reduced then overall drag is reduced.
但是，压力引起的阻力才是阻力的主要方面，所以如果这个方面的阻力能够减小，那么总体阻力也将会减小。
The theoretical analysis and experimental results show that boundary layer separation will produce pressure drag.
理论分析和实验的结果说明：边界层分离将引起压差阻力。
The boundary layer separation points, minimum pressure positions on the surface and the drag coefficients are in agreement with numerical solutions and experimental results.
边界层分离点、物面最小压力点及阻力系数的计算结果与一些数值解及实验结果是符合的。
The dynamical model included the effects of the earth non-spherical shape, atmospheric drag, solar radiation pressure as well as lunar and solar perturbations.
在建立动力学模型中，计及了地球扁球形的摄动、大气阻力、太阳辐射压的效应以及日月引力摄动。
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。
In this paper, a solute drag model was proposed to predict the phosphorus inter granular segregation in reactor pressure vessel steels and compared with the rate theory model.
本文提出了预测核反应堆压力容器钢中杂质元素(主要是磷)晶间非平衡偏析的溶质拖拽模型，并且与速率理论模型进行了对比。
Results indicate that when the double container car enters into a tunnel, the pressure drag of the double container car quickly rises, and then rapidly falls.
测试结果表明：双层集装箱车辆进入隧道口时，空气压差阻力急剧上升，之后又迅速回落；
This paper introduces a process method of the pressure data in the wake to obtain the drag characteristics with high accuracy, and discusses about the drag measurement at high Angle of attack.
本文就如何处理尾迹区的测压数据来确保阻力测量的精确度及如何测出大迎角的阻力特性进行了一些探讨。
Basing on the conception of local drag coefficient in the pipeline field, the pressure drop coefficient of fluid in each inclined flue under different condition of pressed brick was calculated.
借鉴管路计算中局部阻力系数的概念，进一步计算了斜道区不同压砖情况下的压力损失系数。
Integrating the pressure on the solid surface, the lift and wave drag is obtained.
对物面上压强积分，求得物体的升力和波阻。
Dissociation and ionization of air bring on lower drag coefficients of the orbiter than that obtained from perfect gas model, while the location of pressure center moves forward.
空气的离解和电离导致轨道器的阻力系数比完全气体计算值低，压心位置前移。
Drag to add a hydraulic reservoir at atmospheric pressure, with return line below fluid level and air filter.
拖动后可在常压下添加带有回流管(低于流体水平面)和空气过滤器的液压容器。
Research on drag reduction mechanism of supercavitation shows that supercavitation can reduce not only the friction drag coefficient but also the pressure drag coefficient.
超空泡减阻机理的研究表明：超空泡不仅可以减小回转体的摩擦阻力，还可以减小回转体的压差阻力。
It is shown that aerospike nozzle performance losses caused by free stream primarily result from increase of lift body base drag and decrease of plug pressure distribution.
结果表明，外流造成的性能损失主要体现在运载器底部阻力增加和塞锥表面压强降低两方面。
After shutdown, the high-pressure plate-fin heat exchanger is recovered to normal run after elimination of the drag through back-blowing of its oxygen passage.
在设备停车后对高压板翅式换热器氧通道进行反吹以消除阻力，使高压板翅式换热器正常运行。
This paper introduces a process method of the pressure data in the wake to obtain the drag characteristics with...
本文就如何处理尾迹区的测压数据来确保阻力测量的精确度及如何测出大迎角的阻力特性进行了一些探讨。
The difference between the front and back bulge edges results in pressure drag which increases with increasing bulge density and height, and with decreasing duty ratio.
结果显示，由于矩形形貌的影响，形成了压差阻力，压差阻力随形貌突起高度或密度的增加而增大，随突起占空比的增加而减小。
The paper gives variations in the forebody drag, the normal force and the pressure center in accordance with the Mach Numbers and the geometric parameters.
给出了前阻、法向力及压心随马赫数或几何参数的变化曲线。
Internal coating used in high pressure, large diameter and long distance gas pipeline has two main functions, one of them is anti corrosion and the other is drag reduction.
高压、大口径、长输天然气管道采用内涂层主要具有两大功能，一是防腐蚀，二是减阻。
Test results show that the drag coefficient and the law of hydrostatic pressure are independent of the entrance tube type.
证明了引入管布置型式对减温器阻力系数和静压分布规律并无影响。
Need to Wall Street pay transcripts baidu double-sided pressure on a regular basis, one side need to find new business growth point, on the other hand also need to reduce bad assets drag on earnings.
需要定期向华尔街交成绩单的百度双面承压，其一方面急需找到新的业务增长点，另一方面也需要减轻不良资产对财报的拖累。
The lift and drag coefficients were determined from the surface pressure distributions, which were measured under all tested conditions.
结果表明：所有工况条件下，加襟翼都能够增加升力系数。
The magnitude of pressure has nothing to do with the direction of the rotation and the drag coefficient is larger than that of a non-rotation golf ball.
并发现带有旋转效应的凹坑高尔夫球受到的阻力系数增大；
The magnitude of pressure has nothing to do with the direction of the rotation and the drag coefficient is larger than that of a non-rotation golf ball.
并发现带有旋转效应的凹坑高尔夫球受到的阻力系数增大；
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